Throwing code P1637? Not on my code list...
Thread Starter
Burning Brakes
Joined: Mar 2002
Posts: 1,215
Likes: 1
From: Mt Isle Harbor NC
Throwing code P1637? Not on my code list...
Anyone know what this is for? It triggers my service vehicle soon message.
Code P1637
Any help?
Thanks!
Code P1637
Any help?
Thanks!
Last edited by REDLYNER; Aug 17, 2006 at 10:30 PM.
Safety Car
Joined: Aug 2005
Posts: 3,968
Likes: 867
From: Tulsa Oklahoma
DTC (Diagnostic Trouble Code) P1637 is activated when:
- An improper voltage level has been detected on the alternator lamp driver circuit.
- Above conditions for at least 30 seconds.
The GM Service Manual provides step-by-step diagnostic procedure. It would take me several hours to type it all in....
Rick
- An improper voltage level has been detected on the alternator lamp driver circuit.
- Above conditions for at least 30 seconds.
The GM Service Manual provides step-by-step diagnostic procedure. It would take me several hours to type it all in....
Rick
