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Prev Professional Automotive Repair Technical Discussions for March 1, 2012
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2001 Buick Regal GS 3.8L Poor Idle Quality
once you hit the gas rpms shoot to 2500 rpm. checked for vacuum leaks found none. also replaced mass air flow with known good one and new iac valve.very stumped. pcv valve is free.any suggestions??? Trouble codes: P0507
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1997 Cadillac Eldorado ETC 4.6L Blower VIN: 1G6ET1297V
Inop HVAC blower on this car. 3 wires on the blower motor. Batt, ground, and the variable voltage signal wire. Power and ground is good. There is no varied voltage from signal wire at any time, regardless of control setting or key on/off. With the fan connecto...
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1999 Chevrolet Malibu LS 3.1L MIL Lamp on VIN: 1G1NE52J1X
Hopefully someone has experienced this and could offer some friendly advice, thanks in advance. have a 99 malibu with 3.1 J motor, fuel trims are out of wack, and sets a hard code p1133, 02 sensor 1 insufficient switching, observing data it seems to be switchi... Trouble codes: P1433
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2004 Chevrolet Silverado 2500 HD 6.6L Oil Pressure Guage VIN: 1GCHK23184
I am looking for any techs that have possibly run into any oil pressure concerns. Customer stated oil pressure guage started reading lower in the last 2 weeks. Performed oil pressure test and pressure is 2 lbs. Lower than spec. No running problems or engine no...
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2006 Chevrolet Express 1500 4.3L MIL Lamp on VIN: 1GCFG15X46
the van was bought it in the option,the problem is it not power under load at all.the van in park or nutral runing smoth and normal,raise rmp normal but when i put the car in drive or reverse no power at all,somebody cleaner catalyst both sides that why i have... Trouble codes: P0507, P0420, P0430
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2008 Pontiac G6 GT 3.5L Air Bag System VIN: 1G2ZH57N08
Car has intermittent air bag light with codes B0083 71 and B0084 71 Mitchell and All Data say that The SDM has received invalid serial data from the front end sensors. Testing shows no problem found. Any body had this before should I replace both sensors. Cust...
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Fixes & Summaries for GM
Fix/Summary Answers
1986 Buick Skylark Custom 2.5L Instruments VIN: 1G4NJ69U8G
We fixed it, sort of. I found a similar problem in the archives that said to disconnect the tan wire from the headlight/ dimmer switch but we didn't have a tan wire. So we disconnected the brown wire and now the instruments work when the lights are on. The ins...
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1995 Chevrolet Beretta Z26 3.1L Misfire VIN: 1G1LW15M5S
WELL THE CAR HAS BEED ON THE ROAD FOR A WEEK NO PROBLEM LOUS C HIT THE NAIL ON THE HEAD WITH THE CAM SENSOR THANKYOU FOR THE PHONE CALL AND INFO, IT MADE PERFECT SENSE WHY I HAD PULSE FOR TEN SECONDS OR SO, THE CAR GROUP FIRES THE INJECTORS AT START UP AND WHE...
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2000 Chevrolet Silverado 1500 5.3L reverse VIN: 2GCEK19T0Y
first off thank you for all of your help. this one is fixed and down the road. i am going to answer the questions asked first. it is not a plow truck, 4" body lift,big tires,i put an external cooler on it last time. the fluid was clean and good color,the boost...
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2003 Chevrolet Tahoe LT 5.3L Stall, MIL Lamp on, Loss of power VIN: 1GNEC13Z83
thanks to all the replies. the replies ran the gammett, most different on everything. we pulled the wiring loom from the throttle body to the module and ohm'd and wiggled it , no problem. we did the same with the module to pedal loom, no problem. so we repl... Trouble codes: P1516 (Electronic throttle mode vs throrrle os performance), P0120, P0226, C0245, U1000 (Class 2 data link fault).
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2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNDT13S93
Hello, I received all kinds of suggestions. Watching the actual camshaft position on the scan tool (and on a scope) the cam did change position (fully) if we put power and ground to the actuator solenoid with it running. If you left it totally unplugged and ju... Trouble codes: P0014 (p1345-), P1345.
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2003 Chevrolet Silverado 1500 5.3L blower VIN: 2GCEK19T83
blower motor was pulling to many amps thank you too every one who replied
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2004 Chevrolet Astro 4.3L No Start, Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 1GCDM19X04
due to mileage and excessive crank play cust traded car in thanks to all who replied
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2004 Chevrolet Silverado 1500 5.3L Driveability VIN: 2GCEK19T34
Coolant pressure test revealed the water pump was the cause of coolant smell, pump was ok just the gaskets were leaking. Replaced the gaskets. Fixed and got vehicle back together, up to running temp (195) and put coolant pressure test back on to make sure no o...
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2007 Chevrolet Equinox LT 3.4L starter VIN: 2CNDL63F27
checked allthe grounds, they were clean and tight, checked battery cables and they were clean and tight. the customer decided to take the car for now, but if it comes back for this problem, i will defenetly check the rear wiper as suggested. thanks to those th...
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2009 Chevrolet Equinox LT 3.4L Electronic VIN: 2CNDL53F19
Hello Techs, Further testing and road tests could not make the code return. We did a relearn on the system and cut the vehicle loose. Thanks to all for your help , we [...] have this vehicle back it the problem returns.
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1993 GMC C2500 Suburban 7.4L Cuts out VIN: 1GKGC26N8P
had to go back to old school,started unpluging sensors to see if ecm was functionig corectly and behold-the tps would not set a code when unplugged and had .12 volts on circut,the computor was seeing tps data but not prosessing it for proper fuel demand.the tr...
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