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 MANUALSPONTIAC1987GRAND AM L4-151 2.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINS
1987 Pontiac Grand AM L4-151 2.5L
Computers and Control Systems: Technical Service Bulletins
1987 Pontiac Grand AM L4-151 2.5LSECTION Technical Service Bulletins
- Customer Interest
- Electrical - MIL ON/DTC's Set By Various Control Modules
- Electrical - Intermittent MIL/DTC P2138/Reduced Power
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - Intermittent TCC, MIL ON, and DTC 62/26 Set
- Engine - Hard Start/Detonation When Hot
- Engine - Stalling When Placed In Gear/Code 35
- Engine - Poor Cold Performance and Code 44
- Ignition System - Intermittent No Start
- By Symptom
- Abnormal wear/deterioration
- Customer Interest
- Electrical - MIL ON/DTC's Set By Various Control Modules
- Electrical - Intermittent MIL/DTC P2138/Reduced Power
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - Intermittent TCC, MIL ON, and DTC 62/26 Set
- Engine - Hard Start/Detonation When Hot
- Engine - Stalling When Placed In Gear/Code 35
- Engine - Poor Cold Performance and Code 44
- Ignition System - Intermittent No Start
- Driveability
- Erratic Shifting
- Leaks
- Loose
- Starting problems
- All Technical Service Bulletins
- Engine - THIS BULLETIN HAS BEEN CANCELED
- Electrical - MIL ON/DTC's Set By Various Control Modules
- Electrical - Intermittent MIL/DTC P2138/Reduced Power
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - Intermittent TCC, MIL ON, and DTC 62/26 Set
- Engine - Hard Start/Detonation When Hot
- Engine Controls - ECM May Contain Wrong PROM
- Oxygen Sensor Test - Revised Tech 1 Mass Storage CD
- ECM/PCM - Damaged and/or Mis-Diagnosed
- Engine Controls - Damage to Electrical Terminals
- ECM/PCM - Circuit Board Damage Prevention
- Engine Controls - MAP Chart, DTC's 33, 34 ,63 ,64
- Engine Controls - Code 42 (Spark Timing) Chart Revised
- Engine Controls - Static Electrical Damage Precaution
- Engine - Stalling When Placed In Gear/Code 35
- Engine Controls - Updated Chart A3, No Start
- Engine - Poor Cold Performance and Code 44
- Engine Controls - Updated Rough/Unstable Idle Chart
- Electronics - Electrostatic Discharge Damage
- ECM - Revised Replacement Procedure
- ECM - Packard 32 Way Connector Identification
- ECM - Terminal Voltage Update
- O2 Sensor - Bosch Design
- Oxygen Sensors - Silica Contamination
- Ignition System - Intermittent No Start
- PROM/MEMCAL - Identification Marks
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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.