Last post on Jun 24, 2012 at 9:26 PM
You are in the Chevy Express & GMC Savana
What is this discussion about?
Chevrolet Express, GMC Savana, Chevrolet Express Cargo, Chevrolet Sportvan, Chevrolet Chevy Van, Chevrolet Chevy Van Classic, Van
#650 of 654 2003 ex. 3500 check engine light at 70 mph
Jun 23, 2012 (1:38 pm)
I have a 2003 Express exteded cargo van. Has 88,000 miles on it. The check engine light is coming on only if I reach 70 mph. If I slow down light goes off. Does anybody have a guess or has gone through this with theirs. Thanks in advance for any help!!!
#651 of 654 Re: 2003 ex. 3500 check engine light at 70 mph [carpetguy1]
Jun 24, 2012 (5:49 am)
Hi, check ur transmissionoiltemprature!
Check Transmissionoil! Change it, or refill to max!
#652 of 654 Re: 2003 ex. 3500 check engine light at 70 mph [carpetguy1]
Jun 24, 2012 (11:13 am)
I do not have personal experience with this but have a recall of reading something about oil pump problems that occurred under load ... like when you are moving 70 MPH. Checking your engine and transmission oils and filters are the first step. If they are okay I would then look at what is needed to inspect the oil pump.
#653 of 654 Re: 2003 ex. 3500 check engine light at 70 mph [tbb2]
Jun 24, 2012 (9:25 pm)
#654 of 654 Re: 2003 ex. 3500 check engine light at 70 mph [wikinger]
Jun 24, 2012 (9:26 pm)