Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1995SUBURBAN K2500, 7.4 NREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 43 (COMPUTER RELEARN PROCEDURES)RELEARN PROCEDURESSHIFT QUALITY QUICK-LEARN PROCEDURE
1995 GMC Suburban K2500, 7.4 N
Shift Quality Quick-Learn Procedure
1995 GMC Suburban K2500, 7.4 NSECTION Shift Quality Quick-Learn Procedure
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
- This procedure quickly optimizes shift quality. Procedure must be performed after disconnecting battery or loss of voltage supply to Transaxle Control Module (TCM), replacing TCM, transaxle internal components, solenoid assembly or torque converter.
- Chrysler's Diagnostic Readout Box (DRB) scan tool with proper cartridge must be used to perform shift quality quick-learn procedure. The following conditions must be met when performing shift quality quick-learn procedure: oil temperature must be greater than 60°F (16°C), brakes must be applied when indicated, engine speed greater than 500 RPM, throttle angle less than 3 degrees, gearshift must be moved only when indicated, gearshift must remain in overdrive as indicated until DRB indicates procedure is completed.
- If unused replacement TCM is installed on vehicle with engine at normal operating temperature, shift quality quick-learn procedure will cause TCM to indicate a cold oil temperature. Oil temperature must be monitored with DRB.
- If oil temperature is less than 60°F (16°C), allow engine to idle until oil temperature is greater than 60°F (16°C). If oil temperature is greater than 200°F (94°C), allow transaxle to cool until oil temperature is less than 200°F (94°C).
- Connect DRB to data link connector, located near brake pedal at bottom of instrument panel. Using proper cartridge and DRB manufacture's instructions, move through program to enter 41TE/AE menu. Start vehicle. Select ADJUSTMENTS function.
- Apply brakes. Select QUICK-LEARN function. Place gearshift in Neutral and then "OD" (overdrive) when indicated. Wait until TEST COMPLETE is indicated on DRB. Place gearshift in Park. Release brakes. Remove DRB.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.