Info - Oil Life Monitoring System - PCM Reset. Pontiac GMX281 2004

For 1990-2009 cars

# Info - Oil Life Monitoring System - PCM Reset

Subject: | Oil Life Monitoring System -- PCM Reset

Models: | 2004 All GM Passenger Cars and Trucks

| 2004 HUMMER H2

| EXCLUDES:

| Chevrolet Aveo, Astro, Blazer, Cavalier, Epica, Malibu Classic, Optra, S-10, Tracker

| GMC Safari, Jimmy, Sonoma

| Pontiac Sunfire, Vibe

Important: The Oil Life Monitoring System can be found on many General Motor's vehicles prior to 2004. Refer to SI and/or the Owner's Manual for detailed information.

The purpose of this bulletin is to help technicians identify which vehicles are equipped with the oil life monitoring system. Although many General Motors vehicles prior to 2004 have been equipped with the oil life monitoring system, the 2004 model year vehicles were used as a starting point to validate the system/scan tool functionality.

Customers have come to depend on the Oil Life Monitoring System found on most General Motor's vehicles to inform them when it's time for an oil change. If for any reason the PCM is replaced, it is important to access the "Percent of Oil Life Remaining" from the vehicle's current PCM PRIOR to removing the PCM. This value must be programmed into the new PCM (after it is installed in the vehicle) by using the scan tool.

Notice: Failure to reprogram the value to the new PCM will result in missed maintenance, which may cause damage to the engine.

Important: If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to changed at 5,000 km (3,000 mi) from the last engine oil change.