Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 29, 2014
International Automotive Technicians' Network (iATN) - Members Only
Next
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
2001 Chevrolet Silverado 3500 LS 8.1L Lack of power VIN: 3GBKC34G11
Will not go over 30 mph. And looses power in shop under load runs perfect at idle, when driving at wot.app is at 100% tps is at 30%. Why? tps, maf,baro,rpm,engine load,all mirror each other. At all speeds and rpm ranges. Stft and ltft at 0 + or - 5 all speeds ...
View
2006 Chevrolet Colorado LT 2.8L Starting VIN: 1GCCS148X6
’06 Chevy Colorado 2.8 4cyl auto 2x4 reg cab Truck came in with customer complaining that it sometimes wouldn’t crank. We replaced the ignition switch (that part is sold with the cylinder housing, we only replaced the switch and kept the original cylinder hou...
View
2008 Chevrolet Uplander 3.9L pressure control solenoid VIN: 1GBDV13178
This is an intermittent problem but is starting to be more consistent. The complaint is an intermittent harsh shift. I drove this home at night to try to verify, first problem was the speedo needle fluctuating and a clicking noise at the same time coming from ...
View
2008 Chevrolet Colorado WT 2.9L Battery Light VIN: 1GCCS14968
Vehicle came in for intermittant hard starting battery/charge lamp on all the time. Checked starting and charging system all checked out ok at this time. Neg battery terminal alittle corroted.
View
2000 GMC C3500 Sierra SL 5.7L Running VIN: 1GDGC34R2Y
Plugs 1 3 2 4 soaked w/ fuel used scan tool to fire off each injector with fuel gauge connected , all had equal pressure drop . Before I condemn the "spider assy." Has any one run into this condition where only 1243 get soaked ? Thanks in advance !!
View
2001 GMC Sierra 1500 SL 5.3L Poor Idle Quality VIN: 1GTEK19T61
Hi techs, I have been going in circles on this job .Can not seem to pinpoint the problem. Truck came in with Hi idle and intake leaks. Both banks running lean trims. Also had a higher than normal idle when cold, settled down after 30 seconds but still higher t...
View
2007 GMC Sierra 3500 HD SLE 6.6L Stall VIN: 1GDJK34677
HELP PLEASE. This is a plow truck. vehicle stalled at idle while driver was shoveling walkway. Restarted ok but quit again when plowing. Did not want to restart this time but started after several minutes and drove to the shop fine. Our problem seems to be hea...
View
2000 Pontiac Grand Prix GT 3.8L Misfire, MIL Lamp on VIN: 1G2WP52K5Y
Hi everybody looking for help on this one we did cylinder heads on this for a #4 burnt exhaust valve and we put it back together and it now misses only at idle on #4 cylinder we have swapped injectors, coils, wires, plugs, and put a ignition control module on ... Trouble codes: P0300, P0304
View
2003 Saturn Vue 3.0L p.c.v. VIN: 5GZCZ63B43
vehicle appeared 3 weeks ago during the first cold snap with a blown valve cover gasket.performed p.c.v. tube reroute per t.s.b.,informed customer gaskets or seals may be too damaged to seal due to age since having oil pushed by due to p.c.v. freeze-up.drove s...
View

Fixes & Summaries for GM
Fix/Summary Answers
1993 Chevrolet K1500 Silverado 5.7L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on
I first rotated the motor to cylinder 1 TDC. Verified mark was on, was off about 3 degrees ATDC but I feel that small amount can be corrected through distributor and I believe the balancer is fine, I removed belt and could not slide balancer freely from the pu... Trouble codes: 43 (Knock sensor / esc signal).
32
2002 Chevrolet Camaro 3.8L vibration VIN: 2G1FP22K32
Customer broke the transmission bell housing when he installed the engine. Snapped off the driver side lower ear and actually there is piece missing from the bell housing. Too bad they do not allow pictures and I would send pictures of repairs often. Thanks al...
13
2003 Chevrolet Venture LS 3.4L Pass Key VIN: 1GNDU23E33
Hi. Classical issue: customer don't want to pay any moore. But i've learned an important thing in this procedure: GM pk2 are programmable, but GM PK3 are not. So a new pass lock with a new lock cylinder must repair the problem. Too expensive for the customer.....
7
2004 Chevrolet Impala LS 3.8L Surge, Stall VIN: 2G1WH52KX4
Thank you to all that responded, as always Tech help is exceptional. This one is fixed. In monitoring fuel pump feed line bleed down, the start and stumble correlated with how much pressure drop was witnessed. The more the pressure drop, the more stumble or st...
9
2005 Chevrolet Colorado Z85 3.5L MIL Lamp on VIN: 1GCCS19685
still not fixed,tried everything suggested and more,think I'm going to try new pcm next.The truck has 240,000 miles on it,starts and runs fine just won't complete the relearn or erase code,which is why I think it won't do the relearn.Thanks for all the replies... Trouble codes: P0315.
8
2005 Saturn Ion-2 2.2L Mechanical VIN: 1G8AZ52F95
Thanks for the help. The vacuum pump did the trick. It took 6 times but i have a great clutch now
6
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next