05 Suburban warning lights

[RRiggins]

I have multiple warning lights on my Suburban. They don't seem to affect driveability, but I know I need to figure them out. They include airbag warning light, tire pressure monitor light, 4WD service light, and most recently the misfire / flashing engine light. These all come on randomly and can be turned off by just hitting the odometer return in the steering wheel. The misfire does have a rough idle and while in drive and stopped, but low power mode has not come on yet. This is a Vortec 5.3 and is a remanufactured motor with about 70K miles on it. Any suggestions or advice would really help. Thanks.

 

[TJBaker57]

misfire / flashing engine light

Driving with this active can lead to catalytic converter damage.

Fixing the misfire would be my number one priority.

 

[Mooseman]

The CEL is the only light that's directly connected to the PCM so I'd concentrate on fixing that first for the reasons explained by @TJBaker57 . Getting the codes from it will help pinpoint which cylinder is misfiring as well as any other codes.

AS for the rest of the lights, that will also need to be scanned. I would be there are U codes in there for loss of communication.