Diesel Fuel Additives

This information pertains to 1994-2003 vehicles with 6.5L or 6.6L Diesel Engine (VINs F, P, S, Y, 1 -- RPOs L65, L49, L56, L57, LB7). (fig. 1)

TIP: The use of diesel fuel additives is not required or recommended for the 6.5L diesel or the 6.6L Duramax® Diesel engine under normal conditions. The filtering system is designed to block water and contaminants without the use of additives. However, some customers may desire to use fuel additives to improve the characteristics of available diesel fuels.

Water Emulsifiers and Demulsifiers
Fuel additives must be selected carefully. There are two common methods that fuel additives use to cope with water in the fuel.

Demulsification causes water particles to combine together to form larger particles, which drop out of suspension. This allows the fuel filter/water separator to separate the water from the fuel as it is designed to.

Emulsification keeps water particles suspended in the fuel. Alcohol is frequently used as the emulsifier. Emulsification can allow water to get past the fuel filter/water separator, in most cases causing damage to the fuel system.

IMPORTANT: Only alcohol-free water demulsifiers should be used in General Motors Diesel engines. Both Racor® and Stanadyne® diesel fuel additives are alcohol-free and utilize water demulsifiers to cope with water in the fuel. Other brands may be available in different areas. Before using them, be sure they clearly state that they are alcohol-free demulsifiers.

(We believe these sources and their products to be reliable. General Motors does not endorse, indicate any preference for or assume any responsibility for the products from this firm or for any such items, which may be available from other sources.)

COMMON DIESEL FUEL CONCERNS
Fuel Waxing/Icing
Fuel distributors blend number 1 and number 2 diesel fuels for seasonal requirements in a particular region. No other blending of fuels is recommended. However, a customer may desire to use a winter fuel additive to prevent fuel waxing or icing during extreme cold snaps. If a winter fuel additive is used, it should not contain alcohol or other water emulsifiers that may compromise the water removal effectiveness of the fuel filtering system.

Bacteria and Fungi Growth
Bacteria and fungi growth can occur in diesel fuel when there is water present, especially during warmer weather. The best prevention against bacteria and fungi growth is to use clean fuel that is free of water. There are diesel fuel biocides available to kill bacterial growth in the fuel system. However, the dead bacteria can cause blockages throughout the fuel system. If bacterial growth is found in the fuel system, the proper method of removal is to flush the fuel system using service manual procedures, replace the fuel filter element, and refill the tank with clean diesel fuel. If a customer desires to use a biocide after flushing the fuel system, it should not contain alcohol or other water emulsifiers.

Low Cetane Number
The cetane number is one indicator of a diesel fuel's ability to ignite. There are many indicators of overall fuel quality such as cleanliness, specific gravity, volatility, viscosity, detergency, corrosion inhibiting abilities, and lubricity. Increasing the cetane number alone is not a fix for poor quality fuel. Additionally, increasing the cetane number beyond the engine's requirements will not increase performance. However, the cetane number of diesel fuel is not always consistent and some customers may desire to use a cetane improver to ensure full performance of their engine. If such an additive is to be used, it must not contain alcohol or other water emulsifiers.

Poor Lubricity
The 6.5L diesel and the 6.6L Duramax® Diesel engines are designed to operate on today's low sulfur fuel without the use of additives. A fuel additive designed to increase lubricity is not a fix for poor quality or contaminated fuel, but some customers may desire to use a lubricity additive to aid in the longevity of their fuel system components. If such an additive is to be used, it must not contain alcohol or other water emulsifiers.

FUEL SOURCE ISSUES
If a vehicle is properly maintained but has fuel contamination issues, consider obtaining fuel from a different source. Purchasing fuel from a high volume fuel retailer increases the likelihood that the fuel is fresh and of good quality.

- Thanks to Andy Sutherland

Did you hear the one about the guy who bought the latest high-tech (you fill in the blank) and it was obsolete before he opened the box?

Or version 7.0 of a hot computer game being released before version 6.0 went on sale?

So, naturally you’re skeptical about the life expectancy of the Tech 2, right? Your shop could really use an additional one, but you don’t want to buy something that’s going to be obsoleted right away. What to do?

Designed for Expansion
When the Tech 2 came out in 1996, it had 10 times the mass storage capacity of the Tech 1 it replaced, and four times the display space on the screen. The processor went from 8 bits to 32 bits, so it was considerably faster.

That was then; this is now. Is the Tech 2 able to keep up?

To put your mind at ease, remember that the Tech 2 was designed to be changeable and expandable, right from the start. This is evidenced by the fact that it contains two memory card slots. And the fact that the 32 MB card was released in December 2001 to replace the previous 10 MB card. With that one step alone, the Tech 2’s storage capacity was tripled.

REMINDER: The 32 MB card is the primary card to be used. If you have not already done so, remove the 10 MB card from your Tech 2. The 10 MB card has been the source of some communication errors.

With the onset of GMLAN (TechLink, Mar. 2003), the CANdi module now enables the Tech 2 to communicate with a whole new data protocol. Other such communication modules may be developed in the future, to extend the useful life of the Tech 2 even further.

Some of the components used in the manufacture of early Tech 2s are no longer available. So, tool engineers have found ways of redesigning circuits for later Tech 2s to use currently available components. These Tech 2s work exactly as the original did. This extra development work was done to ensure that the Tech 2 did not become obsolete, as parts supplies changed.

This kind of refinement is costly, and would not be undertaken if the Tech 2 were approaching the end of its life.

What’s Coming
Many of the operating features of the original Tech 2 resulted from surveys of retail technicians. This is an ongoing process. At present, surveys are being used to gain insight into where the handheld diagnostsic computer needs to go in the future. Should it be a laptop? Or a PDA? Have wireless capabilities? Have handwriting recognition?

At present, the Tech 2 replacement isn’t even in spec form yet. There is a lot of research and development needed before anything like a “Tech 3” becomes a reality. This won’t be soon, and when it does happen, it won’t be a surprise. There will be plenty of advance information and notice before a new tool becomes essential.

Diagnostic tools can have a very long lifespan. In fact, the Tech 1 is still being sold after 13 years!

Diagnostic technology certainly doesn’t stand still. There’s always a need and a desire to diagnose it faster and display it better. Research and development are ongoing. But a significant milestone such as a Tech 2 replacement is not on the horizon.

What Should You Do?
Remember, the Tech 2 isn’t going to be replaced until a vehicle operating system comes along that the Tech 2 can’t be made to talk to. This is not in the foreseeable future.

So, if you need an additional Tech 2, you can purchase it with confidence that it will remain useful and current for a long time to come. Contact GM Dealer Equipment at 1.800.GMTOOLS (1.800.468.6657).

- Thanks to Mark Palmer, John Cicala, Jeff Flood and Mark Stesney

Know-How Broadcasts for May

This information applies to 2000-2003 Cavalier, Sunfire, Malibu, Alero and Grand Am with an inaccurate fuel gauge level reading.

If normal diagnostics lead you to replace the fuel level sensor, here is some late-breaking news.

A new fuel level sensor is manufactured with gold contact surfaces to provide protection against sulfur and contamination in the fuel.

TIP: The previous sensor/pump module is no longer available.The fuel level sensor and the fuel pump module are available as separate replacement parts.

TIP: If you are dealing with an inaccurate gauge condition, install the sensor. If you are dealing with a fuel system performance condition, install the fuel pump module.

Details will be given in an upcoming bulletin.

- Thanks to Steve Oakley 

Blue Fog Lamps

The 2003 Limited Edition Grand Prix has special blue fog lamps. The replacement bulb is different from current Grand Prix lamps (fig. 8). The replacement bulb has a wire pigtail and is available from GMSPO under AC Delco part number 11513798.

TIP: It is not necessary to replace the entire fog lamp when the lamp burns out. Replace only the bulb.

- Thanks to Fred Tebbets

On 2002-03 Impala and Monte Carlo, a gap condition may exist between the Upper I/P pad to I/P trim plate, which may be objectionable to a customer (fig.9).

It is possible to correct or improve the appearance of the Upper I/P pad without replacement. Loosen the attachment screws at or near the area of the gap and retighten while firmly holding the Upper I/P Pad down, closing the area of the gap. Repositioning the I/P Upper Pad in this fashion should eliminate the gap, without requiring the replacement of the I/P Pad.

- Thanks to Gary McAdam

OnStar Wake Up Cycle Change

To create a more streamlined OnStar enrollment process, the vehicle assembly centers are making a change to the OnStar module wake up cycle. These will occur according to the schedule in the accompanying tables.

Remember, in order for OnStar to perform remote functions while the vehicle is off (door unlock, alerts, theft tracking, etc.) the OnStar module must wake up at specified intervals and ready itself to receive a call from the OnStar call center. This wake up cycle is commonly referred to as DRx (Discontinuous Receive).

Previously, unconfigured OnStar equipped vehicles did not perform this wake up cycle; the module was always asleep with the ignition off. The wake up cycle started only after the OnStar system was configured.

Beginning in January of 2003, the following change is being made. Unconfigured vehicles will wake up every 10 minutes for a period of approximately 1 minute. This wake up cycle starts after each ignition cycle, and ends after 24 hours. The OnStar module will then return to sleep mode until the ignition is cycled again. Once the vehicle is configured, the module will return to the traditional wake up cycle. The vehicle will wake up 1 minute out of every 10 minutes over a 48 hour period following an ignition cycle.

TIP: Be aware of this change when performing battery parasitic drain diagnosis.

TIP: The OnStar module can be shut down using the Class 2 Message Monitor of the Tech 2. This does not affect the DRx cycle; the OnStar module will still wake up at the scheduled time.

- Thanks to Dale Tripp and Mike Batchik

Several essential tools were shipped to dealers recently.

J-34730-40 Fuel Pressure Gauge Quick Connect Adapters (fig. 10)
Hummer H1
These adapters are used with the J-29658-D Fuel Pressure Gauge kit and J-34730-1A Fuel Pressure Gauge and Hose Assembly to test and diagnose the supply and return fuel systems.

J-45268-115 TXV Adapter (fig. 11)
2004 Grand Prix, Impala, Monte Carlo, SLR, Malibu, Corvette
This adapter is used to replace the TXV when doing an A/C flush with the ACR2000. The TXV must be removed to allow refrigerant to flow through the A/C system.

J-46405 Seal Installer (fig. 12)
1997-Current Corvette, XLR
The axle shaft seal has been updated for improved performance. The J-36797 Seal Installer no longer fits. The new installer fits both the new seal and the first design seal.

- Thanks to Ryan Jankowski

figure 10

Increased Steering Effort

This condition affects 2003 Chevrolet Cavalier (fig. 13), Pontiac Sunfire, Grand Am, and Oldsmobile Alero equipped with 2.0 Litre L61 EcoTech engine (VIN Code F).

A customer may comment on increased steering effort at vehicle start up on mornings with low ambient temperatures (below 30° F, -2°C).

It may be difficult to confirm this condition, as it may be somewhat intermittent. Normal testing of the steering system (flow meter, test drive, etc.) after vehicle warm up may also be inconclusive. The cause of this condition is a priming issue with the power steering pump. The problem is not within the steering rack. The correct repair procedure is to replace the power steering pump.

Delphi Engineering is currently taking steps to identify and resolve this issue.

- Thanks to Steve Oakley

figure 13

This condition may occur on a 2003 Hummer H2 (fig.14) with Electronically Controlled Air Suspension (ECAS).

While using a Tech 2, if you should encounter a DTC 0660 stored in history, simply delete the code. This can occur upon a rapid ignition cycle from ‘accessory’ to ‘crank,’ while the ECU is performing a self test. A ‘green’ engine causes a significant voltage drop during initial crank. There is no effect on the function of the air suspension and will not be cause for concern for a customer.

TIP: The code will disappear on its own after 100 key cycles and should not reset.

- Thanks to Terry Nicholas

return to Table of Contents

The Delphi P04 Powertrain Control Module (PCM) may set both 5-volt reference DTCs simultaneously during a specific failure condition. Depending on the vehicle platform, these are DTCs P1635/1639 or P0641/0651.

The failure condition resulting in both 5-volt reference codes being set occurs when the Intake Air Temperature (IAT) sensor signal circuit is shorted to battery voltage during start-up. The most likely failure will be an IAT sensor signal circuit that is shorted to a switched ignition voltage circuit. When the PCM circuitry is exposed to this high voltage, a miscalculation may occur in the analog-to-digital (A/D) counts, used in the PCM software. If this miscalculation exceeds a calibrated threshold, the PCM may set both P1635/1639 or P0641/0651.

To correct this condition, test the IAT sensor signal circuit for a short to voltage and repair as necessary. Be sure to verify that the IAT sensor itself has not been damaged. Correct and repair any other DTCs or faults that may be present. There has not been any reported damage to PCMs as a result of this failure.

Use the table to determine which vehicle platform/engine combinations are using the P04 PCM:

- Thanks to Jim Hanna

This information applies to 2003 and prior passenger cars and trucks and 2003 Hummer H2. Refer to bulletin 02-08-42-001.

Most late model vehicles have polycarbonate headlamp lenses. This material is used because of its temperature and high impact resistance.

A variety of chemicals can cause crazing or cracking of the headlamp lens. Headlamp lenses are very sensitive. Exercise care to avoid contact with all exterior headlamp lenses when treating a vehicle with any type of chemical, such as those recommended for rail dust removal. Rubbing compound and cleaner waxes may also attribute to this condition. This could result in the need to replace the entire headlamp housing.

Also, crazing or deformations of the lens may occur if a shop mat or fender cover is draped over the fender and covers a portion or all of the headlamp assembly while the DLR or headlamps are on. This action restricts the amount of heat dissipated by the headlamps.

Once heat buildup is generated by the headlamp, a degradation of the headlamp lens begins. This degradation of the lens can be unnoticeable at first and eventually show up as spider cracks. In more extreme cases, it will begin to melt the lens of the headlamp.

- Thanks to Bob Broughton and Katie Callahan

Vehicles with the 4.2L L6 engine may exhibit a boom or vibration coming from the exhaust, at or near idle.

The following may help reduce the vibration. Unbolt the downpipe from the exhaust manifold outlet and replace the donut seal. When you tighten the downpipe to the manifold, have a second technician hold the rear end of the downpipe so the two exhaust hangers stay centered in the rubber bushing holes. Keeping the rods centered in the bushing holes makes a noticeable improvement.

- Thanks to GM Technical Assistance

On 2003 Buick Rendezvous and Pontiac Aztek, the Body Control Module (BCM) was revised to accommodate vehicle system changes. Because of memory capacity, on vehicles without Driver Information Center (DIC), certain customization options had to be deleted.

Vehicles with DIC retained customization of some features controlled by the BCM, depending on vehicle options.

These decisions were made after final editing of Owner’s Manuals and Service Manuals, so the Owner’s Manual contains customization information pertaining to earlier models.

Service replacement BCMs contain the revised programming and supercede previous BCM part numbers.

IMPORTANT: If the original BCM is replaced in past model year vehicles, previously available customization features will be lost.

- Thanks to GM Technical Assistance 

Bulletins – MARCH, 2003

This review of service bulletins released through mid-March lists the bulletin number, superseded bulletin number (if applicable), subject and models.

00 – General Information

03-00-89-001; Paint Code Corrections; 2003 Chevrolet Suburban, Tahoe, GMC Yukon, XL

03-00-89-002; New Owner Orientation Clinic Materials Now Available Online; 2003 and Prior Passenger Cars, Trucks, Hummer H2

03-00-89-003; GM Goodwrench Limited Lifetime Service Guarantee; 2003 and Prior Passenger Cars, LD Trucks and Hummer H2

02 – Steering

00-02-35-003B; replaces 00-02-35-003; Clunking Noise Under Hood and Can Be Felt in Steering Wheel (Lubricate Intermediate Steering Shaft Assembly); specified 1999-2003 Chevrolet, GMC, Cadillac and Hummer H2 Vehicles with Recirculating Ball Steering

03-02-35-001; Noise/Clunk from Steering Column (Replace Upper Intermediate Shaft); 2003 Cadillac CTS

03-02-35-002; Minor Scratches to Wood Stering Wheels (Refinish); 2000-03 Cadillac DeVille, Escalade, Seville, CTS with Wood Steering Wheels

03 – Suspension

99-03-10-009A; replaces 99-03-10-009; Wheel Balance Weight Usage; specified 1999-2003 Chevrolet, GMC, Cadillac and Hummer H2 Vehicles

03-03-09-001; Rear of Vehicle Appears to Sit Low, Low D Trim Height Measurement (Replace Rear Coil Springs); 2003 Chevrolet Tahoe with Off-Road Chassis Package (RPO Z71), 3rd Row Seat (RPO AS3), and Off-Road Appearance Package (RPO BHP)

03-03-10-002; Use of Correct Installation Procedure for Loose Hubcab Assembly; specified 1998-2003 Chevrolet and GMC Trucks

04 – Driveline Axle

03-04-17-001; Whine Noise from Rear Axle (Diagnose and Replace Rear Shaft with a Tuned Torsional Damper Rear Propeller Shaft); 2002-03 Cadillac Escalade EXT, Chevrolet Suburban, Avalanche, GMC Yukon XL, Denali

03-04-20-001; Revised Rear Axle Assemble Procedure and Special Tools; 1997-2003 Chevrolet Corvette

03-04-20-002; Revised Output Shaft Seal Replacement Procedure; 1997-2003 Chevrolet Corvette

05 – Brakes

02-05-26-002A; replaces 02-05-26-002; Scraping Noise from Rear of Vehicle (Replace Parking Brake Shoe Kit and Clean Drum in Hat Rotor); specified 1999-2003 Cadillac, Chevrolet and GMC Trucks

03-05-23-001; Brake Pulsation/Vibration, Contamination/Corrosion Between Hub and Rotor and/or Drum and Axle Flange (Clean Rotor and Hub and/or Drum and Axle Flange Mounting Surface), 1999-2003 Chevrolet Tracker

06 – Engine/Propulsion System

99-06-01-012A; replaces 99-06-01-012; Remanufactured Supercharger Replacement Units; specified 1992-2003 Vehicles with 3.8L Supercharged V6 Engine (NIV 1 -- RPO L67)

01-06-01-010B; replaces 01-06-01-010A; Polymer Service Pistons; specified 1996-99 Vehicles with 3.1L Engine (NIV M -- RPO L82)

02-06-03-001; Starter Cranks After Key is Released on Cold Start (Normal Condition); 2003 Chevrolet Silverado, Suburban, Tahoe, GMC Sierra, Yukon, XL with 5.3L Engine (NIV Z -- RPO L59)

02-06-04-010; 6.6L LB7 Duramax Diesel Fuel Pressure Regulator Replacement; 2001-03 Chevrolet Silverado, GMC Sierra 2500/3500, Chevrolet Kodiak, GMC Topkick C4500/C5500 with 6.6L Duramax Diesel Engine (NIV 1 -- RPO LB7)

02-06-04-054A; replaces 02-06-04-054; Increased Accelerator Pedal Effort (Clean Throttle Body and Adjust Blade); 1999-2002 Chevrolet Silverado, Suburban, Tahoe, Avalanche, GMC Sierra, Yukon, XL with 4.8L or 5.3L V8 Engine (NIVs V, T, Z -- RPOs LR4, LM7, L59)

03-06-01-002; New Polymer Coated Piston and Rod Assembly; specified 1997-2003 Vehicles with 3.1L or 3.4L V6 Engine (NIVs E, J -- RPOs LA1, LG8)

03-06-01-003; Flywheel/Flexplate Replacement; 2003 Passenger Cars and LD Trucks

03-06-04-011; Programming/Re-Programming, Setup, Configuration of Modules (TBCM, BCM, PCM, VTD, Radio, IPC, DTCs) 2002 Chevrolet TrailBlazer, EXT, GMC Envoy, XL, Oldsmobile Bravada

03-06-04-012; Inspection of All Related Wiring Hrness Connections When Diagnosing Miscellaneous DTCs, Intermittent Driveability Concerns, Hard Start, No Start, Incorrect Gauges, Inoperative A/C Systems, SES Lamp Illuminated, 4WD Lamp Illuminated, IP Gauges Inoperative, Cruise Inoperative; 2003 and Prior Cars, LD Trucks, Hummer H2

03-06-04-013; SES/CEL and/or ABS Warning Light Illuminated, Erratic Speedomter and/or Erratic Shifting, Multiple DTCs set (Reposition Surge Tank Hose Clamp and Repair Wires); 2003 Cadillac DeVille

03-06-05-003; Rattle or Buzz Type Noise from Exhaust System (Install Clamp); 2001-03 Buick Rendezvous, Chevrolet Venture, Oldsmobile Silhouette, Pontiac Aztek, Montana with FWD only

07 – Transmission/Transaxle

99-07-30-017A; replaces 99-07-30-017; Automatic Transmission Oil Cooler Flushing and Flow Check Procedures; 2003 and Prior LD Trucks and Hummer H2

02-07-30-029B; replaces 02-07-30-029A; Powertrain Quality Center for Engine and Transmission Assembly and Transfer Case Replacement; 2003 and Prior Passenger Cars, LD Trucks, Hummer H2

03-07-30-001; Transmission Slipping or Torque Converter Clutch (TCC) Inoperative with No SES Light Displayed and No DTC P1870 (Reprogram PCM and Diagnose Vehicle Using P1870 Diagnostic Table); 2003 Chevrolet TrailBlazer, EXT, GMC Envoy, XL, Oldsmobile Bravada

02-07-30-012B; replaces 02-07-30-012A; Hydra-matic 5L40-E Serviceable Components and Labor Operations; 2003 Cadillac CTS with 2.6L or 3.2L Engine (NIVs M, N -- RPOs LY9, LA3)

02-07-30-052B; replaces 02-07-30-052A; Automatic Transmission Oil Cooler Flush and Flow Test Essential Tool J-45096 TransFlow; 2003 and Prior Passenger Cars and LD Trucks with Automatic Transmission, Hummer H2

03-07-31-001; Low Clutch Pedal Reserve, Poor Clutch Pedal Feel, Transmission Difficult to Shift (Inspect Clutch Cable and Install Clutch Cable Retention Block); 2003 Chevrolet Kodiak, GMC Topkick with Manual Transmission

03-07-30-002; Transmission Cooling System Service Tool J-45096, TrnasFlow Information; 2003 and Prior Passenger Cars and LD Trucks with Automatic Transmission, Hummer H2

08 – Body and Accessories

99-08-64-016A; replaces 99-08-64-016; Use of Silicone for Weatherstrip Maintenance; 2003 and Prior Passenger Cars and Trucks, Hummer H2

01-08-51-004A; replaces 01-08-51-004; Premature Aluminum Hood Corrosion/Blistering (Refinish); specified 1999-2003 Buick, Chevrolet, Oldsmobile, Pontiac models

01-08-64-012C; replaces 01-08-64-012B; Door Glass Sash Out of Run Channel (Repair Door Glass Sash Channel); 1999-2003 Oldsmobile Alero, Pontiac Grand Am

01-08-64-018B; replaces 01-08-64-018A; Front Door Window Glass Won’t Roll Up or Out of Channel (Replace Guide); 1999-2003 Oldsmobile Alero, Pontiac Grand Am

02-08-44-020A; replaces 02-08-44-020; No Audio Out of Speakers at Times (Reprogram Radio and/or Replace Amplifier); 2003 Cadillac Escalade, EXT, Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, GMC Savana, Sierra, Yukon, XL, Hummer H2

03-08-42-001; Dome Lamp Replacement Procedure; 2003 Cadillac CTS

03-08-44-002; Radio and/or HVAC Systems Change While DriNIVg (Reprogram Driver’s Door Module); 2002 Chevrolet TrailBlazer, EXT, GMC Envoy, XL, Oldsmobile Bravada

03-08-44-003; Revised Radio Poor Reception Diagnostic Information; 2002 GMC Envoy, Oldsmobile Bravada with RPO U84

03-08-46-001; Information Required by Technical Assistance Center from Dealers Caling with ONStar and/or XM Radio Concerns; 2000-03 Passenger Cars and Trucks, Hummer H2

02-08-46-010B; replaces 02-08-46-010A; Programming OnStar Module for Canadian French Voice Recognition; specified 2003 Vehicles with OnStar

03-08-49-002; I/P Cluster Lens May Craze or Crack (Replace I/P Cluster Lens Only); 2003 Chevrolet Cavalier

03-08-50-003; Seat Heater and/or Memory Power Seat Inoperative (Replace Memory Seat Control Module); 2003 Cadillac Escalade, ESV, EXT, Chevrolet Avalanche, Silverado, Suburban, Tahoe, GMC Sierra, Yukon, XL, Denali, Denali XL, Hummer H2

03-08-50-004; Power Seat Switch Bezel Pops Out, Trim Comes Off (Install Retainer to Bezel); 2002 Buick Park Avenue, Ultra

03-08-56-001; Shock Sensor Elimination; 1999-2000 Cadillac Escalade, GMC Yukon Denali

03-08-64-002; Door Locks and/or Power Windows Inoperative (Re-route Wires); 2001-03 Chevrolet Tracker

03-08-64-003; Outside Rearview Mirror Shake or Vibration (Replace Outside Rearview Mirrors); 1996-2002 Chevrolet Express Van, GMC Savana Van

03-08-66-002; Wind Noise Heard from Rear of Vehicle (Adjust Primary Seal Flange); 1999-2003 Oldsmobile Alero, Pontiac Grand Am

03-08-66-003; Deck Lid Pull Down Effort too High (Replace Deck Lid Supports); 2003 Cadillac CTS

03-08-67-001; Proper Positioning of Roof Luggage Carrier Crossrails to Avoid Windnoise; 2002-03 Chevrolet S-10 and GMC Sonoma Crew Cab Pickup with Sport Appearance Package (RPO ZR5)