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Prev Professional Automotive Repair Technical Discussions for December 7, 2011
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Limited 3.8L Cuts out VIN: 1G4HR54K6Y
hey guys got one that has me stumped. hard misfire under load. scan tool shows that all cylinders mis at about the same rate. no codes in system. have replaced spark plugs, plug wires, coil packs,ignition module and the 3x cranksensor(the one behind the balanc...
2002 Buick Century Custom 3.1L No crank no start VIN: 2G4WS52J22
Car towed in no start no crank. No communication with2 different scanners/readers. They power up just will not communicate. Instrument panel will not read PRNDL. Checked power at all fuses, under hood and in dash, good. Checked key ohms, read 888. Checked harn...
2004 Cadillac DeVille 4.6L traction control VIN: 1G8KD54Y64
Owner stated that when she drives her car and turns the left turnsignal on the Traction Control lamp comes on.We road test the car,above 32mph turning the left or right turn signal on may or may not set lamp off,a sudden acceleration from 52mph up to 65+ will ...
1994 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GCCS14W2R
Hello everyone, Customer brought this vehicle to the shop - customer stated that while driving up a hill he noticed a lack of power and then a harsh surge happened then vehicle died out (customer then brought vehicle to shop). Inspected DTC's and found 22 an... Trouble codes: 22 (TPS Low voltage), 32 (EGR system problem)
2002 Chevrolet Silverado 1500 4.8L Cuts out, Misfire, MIL Lamp on VIN: 1GCEC19V02
we have changed both o2 sensors, mass air flow, intake manifold gasket, fuel filter, injectors and fuel pressure regulator. Trouble codes: P0300, P0171, P0174
2002 Chevrolet Silverado 2500 Custom 5.7L Shifting VIN: 1GCEC24RX2
This truck came in to shop from a transmision shop where they had serviced the trans whith no luck, truck starts fine when you put trans into drive trans will shift from 1st to 4gear , at 60 kmh there is no 2second or third gear , it gos from 1st to 4th gear w...
2006 Chevrolet Suburban 1500 Z71 5.3L Front Blower VIN: 1GNFK16Z76
Blower intermittently doesn't work. Used volt meter and scope to verify HAVC control working properly. Found that red wire to blower control module intermittently had low voltage and chased that to connector in passenger side dash panel and I wired around it (...
2007 Chevrolet Cobalt LS 2.2L Misfire VIN: 1G1AK55F77
This is a weird one, the car has a very very slight miss @ idle and came in with a missfire code for #2 cylinder, p0302, We swapped coils, plugs, and injectors but the missfire counter on the modis still shows the missfire counts of around 6 to 12 @ idle for #... Trouble codes: P0302
2007 Chevrolet Equinox LS 3.4L MIL Lamp on VIN: SCREAM1NG7
We need help with an ongoing problem with the equinox,on the last go around we replaced the rear O2 sensor.Several wierd things I dont get.Previously the data stream showed no signal fron the MAF , Air temp, or coolant temp sensor.Later they seem to working OK... Trouble codes: P0171, P0420
2008 Chevrolet Silverado 2500 HD LTZ 6.6L Poor Fuel Economy
Need some help on this one, duramax LLM very high oil consumption, 1 gallon per [...], 10-12mpg. Oil seems to be getting sucked through pcv valves, into turbo inlett, through intercooler and back around, all connections and egr very oily. Turbo seems to che...
2006 Saturn Ion-2 2.2L ignition VIN: 1G8AJ55F16
This is a followup for the previous one which I had to close for lack of ability to update. The ignition switch did not cure the problem. TSB states that if the switch has been replaced that the BCM should be replaced. At 500 dollars, I hate to just throw this...

Fixes & Summaries for GM
Fix/Summary Answers
2006 Buick Lucerne CXS 4.6L master cyl abs modulator VIN: 1G4HE57YX6
Sorry for the delay. We believe that the vehicle is fixed, we have not heard from the customer in a couple of weeks.(he may have gone to the dealer where he purchased the used vehicle from) He said the pedal height still wasn't high enough. It definitely was ...
2001 Chevrolet Silverado 1500 4.8L 3rd gear VIN: 1GCEC19V31
Hello everyone, I have fixed this customer's vehicle and I am updating everyone on how it all went to plan; sorry for the original confusing post but the job was a bit confusing since the customer was all over the place when mentioning what was done to the ve...
2003 Chevrolet Tahoe LT 5.3L inside cabin temp VIN: 1GNEC13Z53
thanks to all that helped i believe it is the right side acc will try after the holiday owner says thanks for the advice on pulling passanger air bag to save time
2003 Chevrolet Tahoe LS 5.3L blower speed VIN: 1GNEK13T83
ok all so the customer took vehicle to another shop. however i noticed that when i turned the heat up the blower motor would blow faster on auto. as i previously stated. now to the replies A it is not equipped with cabin airfilter B there is no blower resistor...
2004 Chevrolet Suburban 1500 LS 5.3L Transfer Case VIN: 3GNFK16Z94
This truck is fixed! I wish I new more about manually shifting the transfer case, the second attempt I was able to get 2WD.I attempted to re-install the original encoder and could not due to inproper clocking.I did take it off with both trans and t-case in...
2007 Chevrolet Silverado 2500 HD Classic LS 6.6L alternator VIN: 1GCHK23D47
I replaced the alternator with the factory replacement fixed problem. Service manager said that AC Delco said that was the one but assume that they entered in the 07 New body style and not the classic. Thanks for all the help
1996 Saturn SC2 1.9L Mechanical VIN: 1G8ZG1276T
Transmission came out of vehicle, trans was pulled apart, I forget what parts were replaced because I am not familiar with these transmissions, went back into vehicle and it works like a dream.
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