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Prev Professional Automotive Repair Technical Discussions for February 27, 2014
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Open Help Requests for GM
Help Request Answers
2003 Buick Regal GS 3.8L MIL Lamp on VIN: 2G4WF52143
This one has me a little miffed and I feel like I am likely missing some info! p1639 sets as a "hard code" as soon as its erased. Followed the diag tree. I have a solid, steady 5v. Replaced sensor as part of following Diag tree. A/c works fine and blows cold... Trouble codes: P1639
2007 Buick Lucerne CXL 3.8L battery VIN: 1G4HD57237
customer driving on highway battery light came on pulled off of highway would not start, battery dead Towed vehicle in, charged battery, no codes present, vehicle started, tested alternator 13.8 volts (pcm/ regulator set at 13.8)battery tested fine (1 week old...
2005 Chevrolet Cobalt SS 2.0L No Start VIN: 1G1AP12PX5
Car towed in for no start. My snap -on scanner will not communicate with pcm. It will communicate with bcm. Also power windows and radio just stopped working. Check all fuses and power feeds, they all seem good so far. Ignition switch?
2006 Chevrolet Trailblazer LT 4.2L thermostat VIN: 1GNDT13S86
replaced thermostat and now temp running hot and lower radiator hose staying cold not allowing circulation of antifreeze. changed thermostat again thinking it was defective and same problem. So installed waterpump and still same problem
1997 GMC C1500 Sierra GT 4.3L air bag light on VIN: 1GTEC14W5V
Need to be sure air bag restraint system is working properly and air bag light remains off.
2004 GMC Sierra 2500 HD SLE 6.6L Hesitation, MIL Lamp on, Smokes and no power VIN: 1GTHC29164
this is now the second truck we have in our shop with over 300k miles and with the same exact problems. when the customer is cruising on the freeway and then needs to step on it or even getting on a on-ramp sometimes its just black smoke and no power. sets the... Trouble codes: P0401 (Insufficient EGR flow), P0101 (mass or volume air flow A circuit range/performance)
2002 Oldsmobile Intrigue GL 3.5L engine valley VIN: 1G3WS52H12
Hi there we have a 2002 olds intrigue with a 3.5 the engine valley under the intake manifold is full of oil I see there is a plate in the bottom of the valley but the leak is higher and running along the headgaskets im suspecting headgaskets leaking oil but wo...
2000 Pontiac Firebird 3.8L Engine Locked Up VIN: 2G2FS22K8Y
The customer had come in for a misfiring issue. He had previously had a tune up done, replaced an ignition coil, and we were to solve this misfiring issue. Everything else seemed ok, so we had recommended that the customer have his timing chain replaced due to...
1998 Saturn SL2 1.9L Ignition Module VIN: 1G8ZK5277W
Customer came in on tow truck, no start. Turns over but does not fire. Found good fuel pressure, injector pulse, 60rpm when cranking, no spark at any ignition wire. Found 12v and 5v going to ignition module. Coil resistance 7.8 and 7.9kohm. Replaced ignition c...
2003 Saturn Vue 3.0L TCC lockup VIN: 5GZCZ63B13
This problem child came in with a bad trans.Every thing was done in a trans shop,but it didn't work right.They decided on the TCM being the problem,and customer got a used one.This Vue has been to two GM dealers to be flashed.It is AWD and the used TCM came ou...

Fixes & Summaries for GM
Fix/Summary Answers
2007 Chevrolet Malibu LT 3.5L MIL Lamp on VIN: 1G1ZT58N27
I know a lot of you told me to use a better scan tool.The system I am currently using is snap-on verus pro,just purchased 2 months ago.I checked for exhaust restrictions,none found.I was working with local dealership,they were unable to help find cause.Before ... Trouble codes: P0174, C0561.
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