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Prev Professional Automotive Repair Technical Discussions for April 12, 2012
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Open Help Requests for GM
Help Request Answers
1997 Buick Skylark Limited 2.4L Poor Idle Quality, Cuts out, Stall VIN: 1G4NJ52T3V
when i run the car for 20 minutes and let it sit for 45 minutes i can start the vehicle and within a few second it will stall out. If I restart it takes a long crank before it start again and it will run ok but just a little rough, I tested for high oil pressu...
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1951 Cadillac Series 62 (Car) DeVille 5.4L Wiring VIN: 000FW46458
Two problems guys. I need a proper wiring diagram for the firewall so I can repair the harness which has been substantially damaged. The ignition switch and the underdash wiring is substanially hacked. I only have basic drawings of the typical systems old cars...
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2000 Chevrolet Malibu LS 3.1L No Start VIN: 1G1NE52J2Y
Hello everyone. I have a 2000 malibu that was brought in from dealer with a intermitten no start.Dealer told customer it was bad fuel pump but wanted way to much to fix.When we got vehicle we found 58 psi on fuel press.When vehicle wouldn`t start we have no sp...
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2000 Chevrolet Tahoe LT 5.3L Hvac VIN: 1GNEK13T8Y
HVAC system inop. Neither head unit in front or rear working. fuses good. No blower, A/C light won't come on, only panel illumination lights. Bounced tilt wheel up and down to check for ignition switch problem, no change. Looked at all connectors behind panels...
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2001 Chevrolet Tracker ZR2 2.5L Cuts out, Stall VIN: 2CNBJ73481
Hey guys need some help on this monster. Vehicle came in, the problem is whenever it is put into gear(Rev,Drive,M1,M2) the engine will stall being put under the load. Had originally believed that the problem was in the transmission so the trans was replaced an...
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2006 Chevrolet Malibu SS 3.9L MIL Lamp on VIN: 1G1ZW63126
Greetings: Sold used unit came back with customer complaining of rough idle, smells like overheating-sucks gas way too fast and mil on. NPF on the rough idle, overheat smell and sucks gas way too fast. Did verify mil on. Extracted code P0442-evap small leak d... Trouble codes: P0442 (evap small leak)
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2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Surge, Misfire VIN: 3GNDA13D66
Vehicle came in customer stated car was hard to start and runs rough intermittent. This morning it ran rough it had code p0300. It was racking up missfires on cylinders 2 and 3. We replaced the ignition module and it still ran rough. We have also replaced the ... Trouble codes: P0300
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2007 Chevrolet Silverado 2500 HD LT 6.0L Rt Rear Trailer Lights VIN: 1GCHK29K97
Brake lights and blinkers are inop on rt side for trailer.the strange thing is the fuse under hood has power at all times,the left side is working and fuse has power only when in use .i assume the power distribution box is bad and contains the flasher as well ...
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1999 GMC Sierra 1500 SLT 5.3L Cruise Control VIN: 2GTEC19T8X
We are unable to get cruise control to work. Have checked all switched inputs and all check ok. All brake light bulbs are working. The only thing that we dont know is what the voltage should be on the Green/White VSS input from the VCM. We have 11.5 volts on t...
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2001 GMC Sierra 1500 SL 4.8L steering pull VIN: 1GTEK19V51
I am woking on this truck has a pull to the right will pull you off to the side of the road within a few secounds at higer speeds pulls without touching the brks i have swapped front and rear tires from left to right no change ride hieght measurement ok swappe...
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2004 Pontiac Aztek 3.4L Oil VIN: 3G7DA03E34
Thanks in advance for any help. Customer had vehicle towed in with oil light on and lifter noise. After installing mechanical oil pressure gauge, showing zero oil pressure, I recommended replacing oil pump. Old oil pump seemed sloppy and shaft looked fine. Ins...
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2009 Pontiac G6 GT 3.5L LF seat belt pretensioner VIN: 1G2ZH57N49
This car comes to us from a body shop. They had already replaced the LF pretensioner twice. Alldata says to unplug pretensioner and install 2ohm resister in connector clear code. If code stays off replace pretensioner. Code clears with resistor. Replaced prete...
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Fixes & Summaries for GM
Fix/Summary Answers
1989 Cadillac Allante 4.5L Excessive Emissions VIN: 1G6VR3182K
Thanks to all who replied to this help request. After an oil change and installing a 160 degree thermostat, readings stayed the same. We finally retarded the timing back to 6 degrees which richened the mixture enough to reduce the nox while keeping HC and CO w...
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2003 Chevrolet Venture LS 3.4L Misfire, MIL Lamp on VIN: 1GNDX03EX3
Thank you to all that replied. John, Thomas, and Michael hit the nail on the head. The intake manifold had a crack internally. It is amazing how you can go thru everything in your diagnostic arsenal and still mis something so basic. Pulled the pcv and found th... Trouble codes: P0300.
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2007 Chevrolet Silverado 3500 HD LT 6.0L No Start VIN: 1GBJK34K77
After going over every power and ground at the BCM, we replaced the BCM and the problem was fixed, I did check the BUS with a scope all looked great. the under hood fuse box was disconnected and not reinstalled correctly, use extreme caution when removing this... Trouble codes: U0140 (Loss of Communication with BCM).
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2007 Pontiac G5 GT 2.4L MIL Lamp on, High idle VIN: 1G2AN15BX7
THANKS TO ALL REPLIES. PUT USED THROTTLE BODY ON AND PROBLEM SOLVED. BE CAREFUL WHEN CLEANING THESE THROTTLE BODYS AS THAT IS WHAT CAUSED PROBLEM Trouble codes: P0507 (Iac high rpm).
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2001 Saturn L300 3.0L No Start, Hesitation, Stall VIN: 1G8JW52R41
so the car is not fixed but i did get it to start every time by having the temp sensor unhooked or if i jumped the connector so i installed a new temp sensor and it still does the same thing. but as soon as i unhook it it starts right up any ideas why this mi...
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2003 Saturn L200 2.2L Condenser Cooling Fan VIN: 1G8JU54F83
HI,EVERY ONE THE PROBLEM WAS ECM COULD NOT HOLD THE GROUND TO RELAY.THAT IS WHY SHE THROW ME OFF AT FIRST. BUT IT GOOD AND GONE. THANKS AGAIN MATT
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2005 Saturn Vue 2.2L MIL Lamp on VIN: 5GZCZ33D95
Well,they sold the car with the check engine light on. The car obviously came back to my stall again. I told the management that there was nothing I can do,so I recommended the GM dealership. The vehicle was fixed with a gas cap. I was never able to get any ev... Trouble codes: P2000 (Nox trap efficiency bank 1).
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