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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 27, 2013
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Open Help Requests for GM
Help Request Answers
2006 Buick Allure CX 3.8L No Start, Stall VIN: 2G4WF58206
Calling all GM techs this one has me stumped! Going back about 2 months this car came in as a no start. The powertrain relay wasn't working. I found a broken brown wire by the valve cover and was good until recently. Now the car at times will stall, sometimes ... Trouble codes: U1016
2006 Cadillac CTS V 6.0L Unknown VIN: 1G6DX67D16
This is a supercharged northstar STS-V, the decoder got it wrong. New purchase and car will show reduced engine power and then starter locked, throttle problem. Customer got out and unhooked battery and all is well, has done this several time lately so i got t...
1999 Chevrolet K1500 Suburban 5.7L No Start VIN: 3GNFK16R8X
This vehicle came in for a no start, I check for spark at coil spark ok, check for spark at plugs spark ok. Check for fuel pressure 65psi and 60 cranking. Check for injector pulse, pulse ok and power feed wire ok. Check vacuum while cranking has some vacuum. R...
2000 Chevrolet Impala LS 3.8L Poor Idle Quality, MIL Lamp on VIN: 2G1WH55K4Y
I don't know which to tackle first. I have the misfire issue and also cooling system pressure pegs the scale on my stant raditor pressure tester, only after it warms up though. It takes about 5 minutes or less for the pressure to hit danger zone. Used co detec... Trouble codes: P0306 (Cyl. 6 misfire)
2003 Chevrolet Silverado 1500 4.8L fuel VIN: 1GCEK19V13
Good evening to all This is my personal truck it used to get 16 to 18 mpg around town 20 to 21 on highway.I went from 245/75r/16 to 265/75r/16 had computer reprogammed for the different size tires and now I,m only getting 10 to 11 mpg its hard to believe just ...
2004 Chevrolet W4500 Tiltmaster W4S042 6.0L starter VIN: 4KBC4B1U14
hello This thing is driving me nuts please help.. Just replace engine with thrown rod.. do not know if would turn over prior to install..can start engine with power probe at wire at relay.. have start power at ignition switch when key is turned. relay is good ...
2004 Chevrolet Express 2500 4.8L Flex plate VIN: 1GCGG24V14
This one has had the Flex plate (flywheel) replaced twice. First one was aftermarket and the second one from the dealer. The coveter bushing looks fine and the engine end play is not excessive. I'm thinking a bad converter? Has anyone seen this before? Thanks ...
2005 Chevrolet Colorado Z85 LS 3.5L wheel bearing VIN: 1GCDT14625
Looking for some input on this, at our shop we do not do wheel bearings or rotors on the chevy Colorado or canyon, I guess at our other shop they attempted to do this and it cost the shop money. I am just wondering if I should start taking them or just stay aw...
2001 GMC Sonoma SLS 4.3L MIL Lamp on VIN: 1GTDT13W11
The lower intake let go, unknown how far it was driven before repair, never had a check engine light until intake repair. We believe the customer. After intake repair, they got a crank sensor code. Replaced sensor, still got a code after driving, replaced sens... Trouble codes: P0300 (p0304-), P0304 (testing and results)
2003 GMC Sierra 1500 Denali 6.0L Service 4 wheel steering VIN: 2GTFK69U43
Thank you in advance, we have a code CO455 Service 4 Wheel Steering System. We found the TSB to reflash the BCM. Reflashed and code and problem still present. Followed the tree and concluded the sensor was faulty. Installed a new postion sensor and still have ...
2000 Oldsmobile Alero GL 3.4L Misfire VIN: 1G3NL12E1Y
We have this Alero that has been giving us fits for at least a year now, employee owned vehicle so we bring it in when were slow. It has a cylinder #2 missfire under load only. car idles fine in shop, you can even put it in gear and load the motor with no prob... Trouble codes: P0302 (Cylinder 2 missfire)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Chevrolet Corvette 5.7L battery VIN: 1G1YY32P5S
Thanks to everyone that helped me out. In the end I explained the customer that due to the lack of use of the vehicle, it would be near impossible to keep the battery charged, i recommend she have a battery tender installed or use the car more often. thanks ag...
1993 GMC K1500 Sierra SLE 5.7L Pump gear breaks VIN: 2GTEK19K4P
First off I would like to thank all that responded to this help request. I replaced the flywheel with a new flywheel, I replaced the torque converter making sure it was of original quality, and the transmission failed again. Keep in mind the reason for the r...
2000 GMC Sierra 1500 SL 5.3L Solenoid A VIN: 1GTEK19T5Y
Thanks to all that replied. Replaced PCM to resolve solenoid A signal issue and higher than expected line pressure. FYI - pressure was 110psi and jumpy in non tow mode. Tow mode the pressure dropped to 75psi and stable. New PCM - pressure 75psi and stable ...
2006 GMC Envoy Denali 5.3L No Start VIN: 1GKET63M26
Motor has wrong crankshaft in it. Found a good running 06 envoy. Got a couple scope captures of it. Also removed starter and checked tone ring on crank. It is supposed to have dual tone rings.
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