Posted by chriscase on Monday, August 13, 2007 at 16:27:59 :
In Reply to: OT- GMC- serial number check posted by wetcoast bruce on Monday, August 13, 2007 at 15:37:20 :
You'll need the door tag or the tag on the differential.
Or jack up one wheel, put it in neutral, count the turns of the drive line vs two wheel turns.