K 2500 Suburban 4WD V8-454 7.4L VIN N TBI (1995)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
ECM - CEL ON/DTC 32 Under Heavy Load
File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 57-65-09
Date: December, 1995
Subject:
Diagnostic Trouble Code 32 While Under Heavy Load (Install New MEM-CAL)
Models:
1994-95 Chevrolet and GMC Truck C/K, G, P Models with 7.4L Engine (VIN N - RPO L19)
Condition
Some owners may comment of a CEL while under a heavy load such as towing. The ECM will have a stored DTC 32.
Cause
Under certain driving conditions, usually while towing, the EGR is commanded to cycle oft and on rapidly. This can cause the EGR to appear
unresponsive to ECM.
