I was jump starting another car, left the vehicles connected via jumper cables and left my Envoy running. Came in and had breakfast, when I went out to check on things, my Envoy was not running and won't start. Engine turns over fine...seems like no spark. ABS & Brake lights are lit

SOURCE: 2002 Yukon Denali will not start

I have the exact some problem 01 Yukon 5.3 – Sometimes my security light also comes on for no reason? Wonder if this has something to do with the remote starter? When this does happen all I have to do is wait for 15 minutes and it fires up just fine. Pisses me off though…

SOURCE: 2003 Envoy, abs light came on and emercency brake light on.

There is a chance that your ABS module is going out, or has gone out, although that doesn't explain the rough idle problem. I had the same thing happen on my '01 Tahoe, and it's a known problem with ABS units. Repair at dealer is over $1200.00. Repair yourself with a rebuilt module is $150.00+shipping and a little elbow grease. Get on EBay, search for ABS module repair, and there is a company in Russia, Iowa who will rebuild the one you have, and warrant it for 5 years (GM won't do that with their $1200 repair.).

The rough idle I bet is coincidental and not related.

SOURCE: 2002 Yukon XL

i serviced my 2004 yukon for abs light came on they told me it was the right front abs speed sensor wire , which is sold sepratly or with wheel hub cost$ 300 or 57$ for just sensor wire, i did all brakes changed sensor and for awhile the stayed off but comes on and at about 20 mph it turns off ?

Marvin

• 85242 Answers
• Posted on Jun 16, 2009

SOURCE: 2004 Envoy xl stalls when making turns

this is caused by slow engine idle speed, do the procedure below.
Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

SOURCE: 03 gmc envoy with 5.3 140000 miles. Oil pressure

There may be a loose wire or the gauge or sending unit may be going bad. The first thing I would do is to hook up a temporary oil pressure gauge, not using the old one at all. With this watch gauge while driving and see what readings you get. If the readings still jump around you have a pump that is getting weak and failing, If that is the case the pump should be replaced, but with high milage you may consider rebuilding the entire engine. If the readings stay normal start checking for a loose wire at gauge or sender. Then check sender, then gauge and replace as needed.