2008 z71 flashing cell

Asked by Jan 29, 2016 at 10:32 PM about the 2008 GMC Sierra 1500 SLT Crew Cab 4WD

Question type: Maintenance & Repair

OK about a month ago my cel was flashing and my truck
ran rough toomey it to the dealer he said I had a misfire on
#7 and#1 cylinders did a tune up and also changed.the
valve cover on the driver side it was recommended  by the
dealership so I did (I did all the work myself )  Now my truck
is doing the same thing so I pulled the plugs to see if any
were fouled out and nope all looked good haven't got the
computer read for the codes yet seeing I work nights I am
gonna have it done over the weekend dies any one have
any suggestions on what to do?

6 Answers

82,995

It could be weak coils, or the spark cables, when was the last real good injector cleaning? A code check should help, possibly it is something different.

OK cool is there a way to check the coil other than moving them around and using the process of elimination. It's been about 50000 miles since I did the last injector cleaning

82,995

Yes you can switch coils around to see if the codes reflect the change, if they do then you have bad coils and or cables. If not then you have to go deeper possible injector problems. I would dump a bottle of Techron in the tank, and run it a few days then clear the codes and see if they return.

OK thanks man I'm sure it would b ok to run the engine like it is right?

82,995

Yeah but make sure it isn't running those cylinders too lean, that could cause other problems later on.

OK sounds good thanks for the help

Your Answer

Add photo

Related Questions

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 58,736 nationwide Sierra 1500 listings starting at $1,599.

ZIP:

Search GMC Sierra 1500 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,610
#2 John Saffrahn
John Saffrahn
Reputation 3,220
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,890
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,743 Great Deals out of 149,174 listings starting at $1,500
Used Ford F-150
3,218 Great Deals out of 205,090 listings starting at $1,779
Used GMC Sierra 2500HD
143 Great Deals out of 12,834 listings starting at $3,999
Used Toyota Tundra
643 Great Deals out of 27,763 listings starting at $3,200
Used Dodge Ram 1500
527 Great Deals out of 13,261 listings starting at $1,800
Used GMC Yukon
565 Great Deals out of 16,646 listings starting at $2,500
Used Chevrolet Silverado 2500HD
423 Great Deals out of 26,888 listings starting at $1,500
Used Toyota Tacoma
712 Great Deals out of 32,123 listings starting at $2,000
Used Chevrolet Tahoe
854 Great Deals out of 28,369 listings starting at $1,700
Used Ford F-250 Super Duty
476 Great Deals out of 41,914 listings starting at $1,999
Used GMC Sierra 1500HD
6 Great Deals out of 126 listings starting at $4,500
Used GMC Canyon
139 Great Deals out of 7,814 listings starting at $2,700

Used Cars For Sale

2017 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
7 Great Deals out of 9,919 listings starting at $41,025
2016 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
24 Great Deals out of 680 listings starting at $34,999
2015 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
45 Great Deals out of 1,073 listings starting at $28,322
2014 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
46 Great Deals out of 1,335 listings starting at $19,995
2013 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
8 Great Deals out of 296 listings starting at $19,995