Question about 1993 GMC Suburban
I assume it is a 5.7L V8, LO5 RPO. I would start with diagnosis of a misfire, Autozone can do this for free with a scan tool. Second, spark plug wires are notorious for degrading with heat over time--may be a wire. First, get it on a scan tool and see if you can identify the cylinder that is misfiring, and check the wire and or plug in that cylinder. You can always shut the vehicle off and remove one wire at a time, start the vehicle and when you come to the culprit, when the engine will not change its idling characteristics---and you found the cylinder by process of elimination.
Hope this helps
(I am assuming it is in the engine firing with my above statements)
Posted on Oct 04, 2010
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 22, 2018 | GMC Cars & Trucks
Oct 26, 2011 | 1999 GMC Suburban
Sep 01, 2011 | 2000 Ford Focus
Jan 30, 2011 | 1994 GMC Suburban
Jul 13, 2010 | 1996 GMC Suburban
Feb 22, 2010 | 2000 GMC New Sierra 1500
Oct 27, 2009 | 1993 GMC Suburban
Sep 20, 2009 | 1989 GMC Suburban
302 people viewed this question
Usually answered in minutes!