Chevrolet Equinox Pre-Delivery and Unique Service Features

To help understand the unique service features of the new 2005 Chevrolet Equinox (fig. 1), refer to bulletin 04-00-89-006. It provides the complete pre-delivery procedure and important service tips. Here are some highlights.

QUALITY PRE-DELIVERY INSPECTION
TIP: A quality pre-delivery inspection is your dealership’s first contact with a new vehicle. And, it’s your first opportunity to influence the customer’s perception of your dealership and increase their satisfaction with the new vehicle.

Be sure two keys and fobs are included with the vehicle.

Ensure that the following loose items are fitted to the vehicle:
- Floor mats
- Antenna
- Front license plate bracket

As soon as the vehicle reaches the dealership, remove the protective film from:
- Front and rear fascias
- Mirrors
- Rocker panels

The vehicle is shipped with extra air in the tires. Adjust tire pressure to 30 psi (207 kPa). The tire pressure label is located at the bottom of the driver side B-pillar.

Where required, install the front license plate hardware. The front fascia has two locating dimples for this purpose.

UNIQUE VEHICLE CHARACTERISTICS
There is airflow from the outer HVAC vents in all modes, to improve side window defogging (fig. 2).

The Equinox is available with both FWD and AWD drivetrains. Some Equinox models have a traction control button next to the Equinox name in the center of the IP and some don’t.

Button -- FWD vehicles with ABS

No button -- FWD vehicles without ABS, AWD vehicles

TIP: AWD vehicles can easily be identified by the emblem on the rear hatch.

The cigarette lighter and accessory power outlets operate only with the ignition in ACC or ON position.

Only the radio is functional in the RAP (Retained Accessory Power) mode. The power windows will not function in RAP. This is normal.

The control for the outside rearview mirrors is located to the left of the steering wheel on the IP.

The roof rack is located by the assembly plant in the optimal location for minimizing wind noise.

ENGINE
The 3.4L (RPO LNJ -- VIN F) engine is similar to other 3.4L engines, but is not interchangeable (fig. 3).

TIP: An engine exchange program is in effect for the first six months.

The crankshaft sensor is located on the right side of the block, next to the bulkhead. The reluctor wheel is located on the crankshaft.

It is important to follow the bulletin procedure to ensure air is removed from the cooling system, to avoid coolant noise concerns. If coolant must be drained, at least 5 liters (5.28 quarts) must be removed, and this is the minimum amount to be added when the system is refilled.

TIP: It may be necessary to raise the RH front corner of the vehicle 3 inches (76 mm) to force trapped air toward the air bleed.

TRANSAXLE
The Aisin Warner AF33-5 transaxle has 5 speeds, is electronically controlled, and features an adapt function.

Shift pressures are automatically adjusted for temperature, altitude, and transaxle component wear, using a process called adaptive self-learning. The adaptive procedure is based on counting the number of upshifts, not driving time or distance.

TIP: It may be necessary to drive far enough to consume a full tank of gas to allow the transaxle to adapt to a particular driver’s habits.

TIP: If the transaxle is replaced, the adaptive function must be reset to default settings, using the Tech 2. Follow this path:
Enter F0: Diagnostics
Select 2005 Model Year
Select LD Truck
Select Chevrolet Truck
Select L Product Line
Confirm Engine (3.4L LNJ)
Confirm Trans 5 Spd - Auto
F0: Powertrain
F2: Special Functions
F1: Transmission Output Controls
F5: Reset Transmission Adapts

The Aisin AF33-5 provides uphill and downhill modes. When driving uphill, the driver may notice that it is not necessary to increase throttle position. This is because the transaxle up- or downshifts as necessary to maintain speed. This is normal operation.

When driving downhill, the transaxle will assist in maintaining speed by applying clutches to achieve automatic grade braking. This feels similar to brake application, and is normal operation.

The transaxle is equipped with an ATF oil life monitor, which illuminates the SES light when oil life reaches 10%. A DTC P1868 indicates the need to change fluid.

TIP: Only T-IV fluid may be used (US 88900925, Canada 22689186). DO NOT use Dexron III.

Reset the oil life monitor accordingly.

Refer to the bulletin for additional mechanical service procedures, including checking and adding fluid.

ALL-WHEEL DRIVE (AWD) SYSTEM
The all-wheel drive system uses the familiar Versatrak components to provide power to the rear wheels if slip is detected at the front wheels (fig. 4).

Refer to the bulletin and SI for service procedures.

ELECTRICAL ARCHITECTURE
The Equinox relies on both Class II and GMLAN for communication. The following modules rely on GMLAN:
- Transmission control module
- Brake module
- ECM
- OnStar module (also uses Class II)
- BCM (gateway between Class II and GMLAN)

TIP: It is necessary to use a CANdi module to communicate with the Tech 2. This has been covered in numerous TechLink articles: Mar. 2003, Aug. 2003, Dec. 2003, Jan. 2004.

CHASSIS/SUSPENSION
The suspension is independent at both front and rear, with MacPherson struts in the front and four-link with coil springs in the rear (fig. 5).

Camber and toe can be adjusted in front and rear, but caster cannot be adjusted at either end.

TIP: Alignment cams are not installed in the rear suspension during production. Service cams are available.

ELECTRONIC POWER STEERING (EPS)
EPS eliminates hydraulic lines and the belt-driven pump, reduces engine load (potential mileage improvement), and reduces operating noise.There are fewer components to service and diagnostics are more accurate.

Major components of the EPS system are the Power Steering Control Module (PSCM), a torque sensor and the Electronic Power Steering motor. The PSCM, torque sensor and motor are serviced ONLY as an assembly.

TIP: Whenever a PSCM is replaced, it must be set up with the proper tuning profile.

AUDIO SYSTEM
The MP3 player accepts MP3 files that are recorded on an up-to-700 MB CD-R. The player is able to read and play a maximum of 50 folders, 50 playlists, 10 sessions, and 255 files.

TIP: These capacities may be reduced if long names are used, or a large number of elements are stored.

TRAINING COURSES
Two training courses are available for learning more about the Equinox:
- 10280.14D New Model Features (EPS and AWD)
- 17341.10V Aision AF33-5 Automatic Transaxle

TIP: In Canada, watch for the 2005 Equinox Features Know-How release..

- Thanks to Ange Girolamo and Ann Briedis

figure 1

figure 2

figure 5

A TechLink article in Dec. 2003 mentioned that GM Service Operations is ending support for Windows 98, Millennium and NT operating systems, effective January 15, 2004. For this reason, many dealers are upgrading and adding PC equipment.

The right PC is as important to a technician’s efficiency and productivity as having the right tools in the toolbox. Because it’s important that dealers purchase the correct type of PC, here are some reminders.

TIP: Refer to Hardware Specs on http://service.gm.com for additional information on minimum and recommended PCs.

Unlike a consumer grade PC, a business grade or commercial PC is specifically configured for use in a business network environment. PCs in this class have components designed and supported for use in a network environment. Additionally, they have greater life cycle stability due to designed-in serviceability. Techline applications will not function properly on typical non-business grade hardware designed for home use.

Although consumer grade PCs may have a more attractive price, their limitations far exceed their initial cost savings, making them not much of a bargain in the end.

Characteristics of Business Grade PCs
- Extended product availability cycles
- Built using same components for generally 3 to 6 months
- Ease of serviceability of internal components
- Preloaded with business software
- Network manageability, utilizing industry standards to manage setup and maintenance

Characteristics of Consumer Grade PCs
- Designed with multi-media hardware features used for gaming, video, music
- Preloaded with multi-media software designed for entertainment
- Multi-media software can cause conflicts with Techline application software
- Not assembled with same internal components through product build lifecycle
- Validation for Techline applications impossible, due to inconsistent internal component build
- Designed for home networking configurations
- Preloaded with internet-ready configurations designed for the home user

TCSC PC Support
Validated PC platforms (i.e., HP d530, IBM NetVista, Dell Optiplex, and Gateway E Series) receive full hardware and software support.

Any PC that meets the minimum hardware spec (P III 600 MHz, 128 MB RAM, WIN 2000 or XP Pro, serial port, IE 6.0, HD 20 GB) but is a non-validated hardware platform will receive support for the Techline applications only. Support ends if the problem is determined to be hardware related.

TIP: AMD and Intel Celeron processors are non-supported hardware. Service Programming Systems (SPS) does not function reliably with typical Celeron and AMD processors. When a Techline PC is interfacing with the Tech 2, the bilateral communication rate and data transfer speed is critical for SPS to function successfully. These processors have proven unreliable in this process.

Dealers with PCs that do not meet minimum spec requirements are asked to replace the PC or upgrade the operating system.

Before making a PC purchase, please contact your Regional Techline Field Consultant (TC) to ensure your PC meets or exceeds the recommended specifications. TC contact information can be found at http://service.gm.com under the Techline tab, or call the Techline Customer Support Center at 1.800.828.6860 for additional assistance.

- Thanks to Mike Waszczenko and Shawn Sullivan

Several electrical switches have been replaced unnecessarily on 2004 Cadillac XLRs.

Traction Control Switch
The traction control switch on the center console is a typical rocker switch (fig. 6), intended to rock in only one direction. To turn traction control off, press the switch. To turn traction control on again, press the switch again.

TIP: Do not replace the switch if the customer is concerned that it rocks in only one direction. This is as designed.
Be sure you also understand the following traction control operating conditions, to avoid unnecessary service.

TIP: When traction control is turned OFF, a traction control warning light is illuminated. The light is NOT illuminated when traction control is enabled.

TIP: Traction control is re-enabled automatically each time the ignition is turned on, even if it was manually turned off during the last ignition cycle.

Power Window Switch and Module
The following is normal operation, and is not reason to replace the switch or module (fig. 7).

If the window module sees voltage below 8v, it will set a DTC B1327 and the window will not operate.

TIP: The DTC will not clear unless voltage is increased above 9v.

Once the battery is charged, or the engine is started, the DTC will clear and the window will operate.

TIP: When voltage raises above 9v, the DTC will move from current code to history code.

If you replace the module (which is not at fault) and then the voltage is raised above 9v, it will look like replacing the module fixed the “problem,” when actually there was no problem, other than low voltage.

When the warranty claim is reviewed, if no trouble is found with the replaced part, it will be charged back to the dealer..

- Thanks to Brad Thacher

figure 7

This diagnostic tip applies to modular fuel pumps on C/K pickup, S-truck, Cavalier, Sunfire and Malibu.

Before condemning a fuel pump, check the teminals in the connector on the pump module (fig. 8) and in the wiring harness connector (fig. 9). If a harness terminal is spread apart, it will cause excessive resistance, which leads to overheating of the terminal.

If you discover this condition, replace the harness connector and terminals with the appropriate service pigtail, available from GMSPO.

- Thanks to Dennis Kissack

figure 8

Most GM vehicles are equipped with a steering column that can be locked using special tool J-42640 (anti-rotation pin). The pin fits into the bottom of the steering column lower shroud (fig. 10).

The J-42640 must be installed whenever:
- the steering column is removed from the vehicle
- the intermediate shafts are disconnected
- wheel position sensor, steering wheel or SIR coil is removed.

Failure to lock the steering column could result in damage to the SIR coil.

IMPORTANT: Do not tilt the steering column with the J-42640 pin installed. Tilting the steering column with J 42640 installed may cause damage to the steering column or instrument panel lower trim panel.

IMPORTANT: You MUST perform all of these steps to ensure that the intermediate shaft does not become misaligned or the SIR coil become uncentered. Failure to do so may cause damage to the SIR coil.
1. Position the wheels of the vehicle straight ahead.
2. Turn the ignition switch to the Lock position.
3. Install J 42640 (anti-rotation pin) to the steering column, if it has an access hole in the lower shroud, to lock the steering column shaft.
4. Make an alignment mark on the intermediate shaft to the steering column, gear, or connecting shaft (upper to lower), to aid in re-installation.

TIP: Some steering columns do not offer any external locking features. On these vehicles, be careful to prevent the steering column shaft from rotating during service of the steering column, intermediate shafts, steering wheel, wheel position sensor, or SIR coil.

If it is determined that the steering column shaft has rotated, it will be necessary to re-center the SIR coil. Refer to the SIR coil centering procedure in SI.

- Thanks to Steve Hathaway

This information applies to 1997-2003 Buick Park Avenue.

A change was made to the ignition key for the model year 2004 Buick Park Avenue, due to a change in supplier tooling. The head of the new key P/N 89023231 is wider than the tabs of the ignition switch of 1997-2003 Park Avenues.

If 89023231 were used as a service replacement key on past model year Park Avenues, the ignition cylinder would have to be replaced as well. To avoid this, key P/N 88891799 is being released by SPO. This key will fit the existing ignition cylinders on past model Park Avenues, eliminating the need to replace the ignition cylinder.

- Thanks to Kobie Glenn

According to a recent survey, over 75% of the warranty claims for engine oil dipsticks are mis-coded. Here are the correct numbers.

The dipstick (or oil level indicator) is the graduated metal rod or wand that is used to indicate the depth of the oil in the engine’s oil pan. The dipstick is inserted into the dipstick tube in the engine block. And the oil level switch (sensor) is an electrical sensor installed into the engine oil pan that is used to detect when the oil has dropped below a safe level.

- Thanks to Tom Spix

Air Bag Module Checkout

Extra attention is needed if a vehicle comes in for service with the air bag telltale illuminated. After reading diagnostic trouble codes and finding that air bag loop faults and/or sensor faults are current, take the time necessary to troubleshoot the wiring fully. Replacing the SDM (fig. 11) will not correct the fault in many situations. A detailed check of continuity for the faulted lines is necessary.

TIP: Check all wiring connections before removing and replacing the SDM.

- Thanks to Tom Nguyen

This information applies to 2003-04 Topkick and Kodiak C4500-C8500 series.

Bulletin 03-07-30-047 explains that inadvertent operation of several instrument panel switches can cause unusual transmission performance.

If the Power Takeoff (PTO) switch is accidentally turned on, it will limit engine operation to 2000 rpm, which results in long, delayed upshifts.

Also, changes in transmission operation or feel can result if the Overdrive Defeat switch is left in the on position.

Before attempting shifting related repairs, check the position of these two switches, and be sure the customer understands their operation.

TIP: A center passenger’s knee can contact the PTO switch, resulting in it being switched on unexpectedly.

- Thanks to Dan Oden

Temperature Gauge Readings

Starting in January 2004, the Buick Rendezvous is available with a new 3.6L LY7 engine. Customers may notice the engine temperature gauge reading slightly past the mid point (fig 12) under heavy loads, in high ambient temperatures, in stop and go traffic, and mountain driving. This condition is a normal operating characteristic of this powertrain.

A customer may also notice more movement in the engine temperature gauge than is traditionally seen with other powertrains. Customers should be reassured the gauge reading as described is normal for this vehicle.

TIP: A gauge reading in the red zone indicates a true overheat condition.

In the LY7 engine, the coolant temperature sensor is located in an area subjected to higher engine temperatures and more temperature fluctuations during normal operation of the cooling system.

- Thanks to Russ Gilbert

The battery on the SSR is located beneath the rear of the vehicle.

Reviews of returned SSR electrical components (BCMs, RDMs, cooling fan components and circuitry) indicate components are being damaged due to improper jump starting and battery charging procedures.

Follow instructions in SI or the owner's manual. There is a remote battery positive terminal located on the right front inner fender and a nearby engine ground (fig. 13).

- Thanks to Dan Oden

Steering Column Noise

Owners of some 2002-03 Chevrolet TrailBlazers, GMC Envoys and Oldsmobile Bravadas may comment on a squeak noise coming from the steering column while turning the steering wheel. Some customers may also comment on a rubbing or scrubbing type noise or feel in the steering wheel during low speed turns or parking maneuvers. The condition may be more pronounced in cold temperatures.

Bulletin 02-02-35-006A provides details for lubricating the serration (slip) joint of the upper intermediate shaft to address the squeak noise (fig. 14).

The rubbing or scrubbing type noise may be addressed by removing material from the upper intermediate shaft bushing to alleviate an interference fit between the upper intermediate shaft boot seal and the intermediate shaft bushing (fig. 15).

TIP: Do not replace the upper or lower shaft to repair these conditions.

- Thanks to Don Sherman

figure 15

Bulletin 03-01-38-005A covers various HVAC concerns on 2003-04 Chevrolet Cavalier and Pontiac Sunfire related to mode and temperature control cables.

Be sure to refer to the bulletin for details. Here are some highlights.

Because symptoms show up as a control knob that is difficult to move, blame is often placed wrongly on the control head. The control head has not been identified as a cause of effort concerns, although the head may become damaged by forcing a knob to overcome an operating condition elsewhere.

TIP: Be sure the cable mounting tabs on the control head are intact.

Cable Conditions
The bulletin points out that a cable may bind, or may become kinked, due to:
- Improper cable routing -- Be sure routing does not cause cable housing or cam interference when the control head knob is operated.
- Improper cable clip positioning -- May have been improperly installed at assembly, or may have pulled off by forcing the control head.
- Cable interference with wiring -- Tie back wiring as necessary.
- Stuck or binding valve -- The defrost valve arm may drop off the edge of the surface and become stuck. The bulletin details how to grind the area. Foam or adhesive may interfere with operaton of defrost and mode valves (fig. 16). The bulletin explains how to trim the material to allow free operation.

Repair Tips
Here are some general tips.
- For diffiucult mode valve operation, where the valve is not stuck, check the mode cable housing for interference with the cam. The cable can interfere with the cam during rotation (fig. 17), causing a condition of low effort, high effort then low effort again.
- If a cable is kinked or stretched, replace it.
- Cables don’t have to be replaced in pairs.
- If routing or clip position was incorrect, be sure to fully function test after making repairs.
- If a cable and clips are not damaged, the cable may be re-used.

TIP: Part number 89018237 (seal kit) is NOT required when replacing a cable. The parts book will be updated on April 1.

- Thanks to Steve Oakley

On the 2004 Chevrolet Malibu Maxx, do not swap the DVD player from a known-good vehicle for diagnostic test purposes. The DVD player will operate ONLY in the vehicle in which it was originally installed. It learns the vehicle's VIN from the BCM on the first ignition cycle after it is installed. A new VIN cannot be learned.

TIP: It is OK to swap the LCD screen from a known-good vehicle for diagnostic test purposes only.

- Thanks to Bruce Moss

The 2004 Cadillac SRX has a delayed door lock feature. If the customer does not understand its operation, the normal function may appear as a problem.

TIP: Refer to Owner's Manual page 2-9 (SI document 1206797) for an explanation of how the Delayed Locking feature operates, and page 3-89 (SI document 894492) for the procedure to turn the feature ON and OFF using the DIC.

If the feature is turned ON and the customer presses the door lock switch to the Lock position, a chime is heard, and the doors will lock about 5 seconds after the last door is closed. Pressing the Lock button a second time or holding the switch down for 3-5 seconds will override the Delayed Locking feature and will lock the doors immediately.

- Thanks to Roger Jantz

Owners of some 2003-04 Buick Regals with sliding sunroof may comment about a sagging headliner ahead of the rear window. This may be most noticeable in the rearview mirror (fig.18).

The sunroof drive motor was relocated to the rear of the sunroof and the headliner is reshaped to provide clearance.

TIP: This is a normal condition and no repair should be performed. See bulletin 03-08-110-007 for details.

- Thanks to Wayne Zigler

return to Table of Contents

Truck Issues – Fix It Right The First Time (new issues in bold)

Know-How Broadcasts for May