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Prev Professional Automotive Repair Technical Discussions for December 18, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y2W
turn key on get message saying secyrity system problem car my not restart have replaced tumbler and computer because there was no commication now there is but no codes this one i driving me crazy any help would be greatly appreciated just had surgery on hand a...
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2006 Cadillac CTS 2.8L Filler tube VIN: 1G6DM57T66
This car will not take fuel. It clicks the nozzle off everytime it is being fueled. We checked filler tube for restrictions and checked vent. A fuel tank R&R is 4.6 hours so before I go there I wonder if anyone has run into this and have any suggestions.
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1985 Chevrolet S10 2.8L No Start, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 1GCC514B5F
When truck showed up it had no spark. Traced to faulty module. Replaced module and coil. Now have spark. Adjusted timing and vehicle runs very very poor. Will not rev above 800rpm. Checked compression. All cylinders are 50 1st puff and 125psi final. Timing cha...
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1996 Chevrolet Camaro 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1FP22KXV
hello to all techs out there. i got this camaro that is driving me crazy. it had a new engine put in a year ago.and,the customer let it sit up till now beacuse the fuel pump was bad. so last week we dropped the tank and cleaned it and replaced the pump. it sta... Trouble codes: P0300
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1997 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M5V
This one has got me stumped, The local tech school installed a used transaxle in this car for reasons unknown, Car always stays in 3rd gear, codes p0560, p1635 stay set, I have follwed flow charts for both codes and the 2 power feeds to PCM are same as battery... Trouble codes: P0560 (System Voltage), P1635 (5 Volt Reference Circuit A)
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1998 Chevrolet K3500 Cheyenne 5.7L Hard start when cold VIN: 1GCHK34R4W
With fuel pressure guage installed, and when ignition switch is in start position, fuel pressure drops from 58 psi. to 50 psi. If you cycle the key on and off several times, the engine will start, and will restart normally as long as engine is warm. Also, the ...
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2000 Chevrolet Malibu 3.1L air bag VIN: 1G1ND52J44
replaced sdm module under seat for water corrosion code and light was gone for 5days light came back on.code b1000 ecu malfunction .replaced bcm with same part # as old one same thing.same code.voltage readings on scan tool fluctuate about 2v. 16v -18-. voltag...
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2002 Chevrolet Monte Carlo SS 3.8L brakes VIN: 2G1WX15K32
We put brakes and rotors on car and now cust complains of a bad shake when brakes are applied at over 60mph.couldnt find anything wrong so we replaced every thing again,actually torqed the lug nuts,no change.front end seems tight.please help I dont know what e...
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2007 Chevrolet Aveo LS 1.6L top speed 30mph VIN: 2536574684
According to GM tech bulletin, these codes refer to the PCM not allowing the throttle actuator to operate, to protect it, due to low voltage; Reccommended proceedure was to test charging system; Tested system with load tester, battery and alternator passed loa... Trouble codes: 2106 (forced limited power throttle actuator system), 2110 (forced limited revolutions minute throttle actuator system)
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1994 Pontiac Grand Prix SE 3.4L Stall VIN: 1G2WJ52XXR
some one help this is a 3.4 dohc car starts and runs then shuts off like some one turned the key off most of the time it starts right back up and runs fine never more than 3 minuts .and some times it wont start at all and when it dont run it has no injector pu...
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2000 Pontiac Grand Am SE 2.4L ETS Light VIN: 1G2NF52T4Y
Hello all techs and happy holidays. I have a 2ooo pont grand am that the when you start the car the trak off light will stay on all the time.If the key is on and eng off the trak off light will come on for 3 sec and go off like normal. In the key on pos, if yo...
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2000 Pontiac Sunfire SE 2.2L Radio VIN: 1G2JB1241Y
I found a couple posts on how to get the code out of the radio. I tried holding the 2 and 3 preset, nothing comes up. does teh car need to be running or just the key on. I also tried leaving the ignition on for an hour to clear the trys I made, still nothing. ...
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Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L No Start, Stall VIN: 4GIG1871OG
first thanks to all who offered help,since i havnt heard any bad news from the cust.i'll venture to call this one fixed,it appears that a ground problem existed under the coil pac area.i assumed it was a ground issue given the circumstances.once again thanks t...
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2002 Buick LeSabre Custom 3.8L Electronic VIN: 1G4HP54K92
well I did fix this car, it turns out that some other shop installed a new blower fan on this car. It turns out that you have to install part of the HVAC plenum with the motor. The motor was rubbing on the top of the case.
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1998 Chevrolet Astro 4.3L Hesitation, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNEL19W1W
Well I know alot of you guys out there are waiting for answers, so here it goes. Most all responses pointed me in the direction of either fuel pressure low or cam retard. Since it takes less of the customers money to adjust the cam retard, that is what I did... Trouble codes: P0300 (Random misfire detected).
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2001 Chevrolet Malibu 3.1L High Idle VIN: 1G1NES2J91
Thanks for the replies, like I had originally posted, my fuel trims were around zero which means no fuel was being added or taken away, like Timothy from Wisconsin said. The fix ended up being a new ECM. Thanks again.
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2002 Chevrolet Silverado 1500 5.3L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2GTEC19T32
I received several good replies. One was check for power steering soaked wiring due to hydro-boost, This truck has a vacuum booster so it did not apply. I wiggle tested all wiring and heated PCM and never got a failure either way. I strongly believe we have a ... Trouble codes: P0122 (TPS Low Voltage), P0300 (Misfire), P0335 (CPK Circuit), P0336 (CKP Sensor performance), P0706 (Trans. range switch V1041 Loss of EBCM comm.), P1637 (Generator L ckt. malfunction P1638 Gererator F ckt. malfunction).
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2003 Chevrolet Silverado 1500 4.8L Misfire, MIL Lamp on VIN: 1GCEC14V43
Thank you all for your useful information, The fix is going to be the intake manifold. I smoke checked at #4 & #6 and found a vacume leak, I will be replacing the intake and that should fix it, again, thaks to all who responded!! Trouble codes: P0304 (Cylinder 4 misfire), P0306 (Cylinder 6 misfire).
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2005 Chevrolet Trailblazer EXT LS 4.2L fuel guage and airbag VIN: 1GNDS13S35
Thanks for the help guys,but unfortunately the customer decided to take the vehicle back to the same dealership that couldnt help her out before.Some people think that all we have to do is throw the vehicles on a computer to fix them.Any ways I have some imfor...
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1999 GMC GMC6500 7.4L brake pedal won't return VIN: 1DGD6H1BOY
well this one we replaced the front brake hoses all went back to normal.thanks everyone for your help.kyle [...]
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2006 Hummer H2 6.0L ignition lock, solenoids VIN: 5GRGN23UX6
Thanks to all who responded we removed the column covers and looked at all the wires and for some reason when I moved wires going to the ignition switch it would mess up and then be fine again got it to go back and forth about 5 or 6 times looked for chaffed w...
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1992 Other GM school bus 360CID 1st gear VIN: 1HVBBHPP8N
Hello friends, The school bus has left us, however it is comimg back to have the torque converter replaced after Christmas. Thanks to all for some very helpful information on this one. To everyone who celebrates this holiday have a "Blessed Christmas". Dan...
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2000 Saturn LS2 3.0L No Start VIN: 1G8JW524R8
Sorry it took so long to get back to everyone that sent stuff in I found that my scan tool could not read BCM codes for this model, scan tool is tool old and i need to updateit, upon using a different scan tool I was able to pull a couple codes that led me to...
3
2002 Saturn Vue 3.0L Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 5GZCZ63B02
AFTER REPLACING MAF WITH NO CHANGE, SMOKE TESTED INTAKE, HAD NEVER DONE THIS BEFORE, SO IT TOOK ME A LITTLE WHILE, BUT LOW AND BEHOLD FOUND A MAJOR VACCUM LEAK ON THE BACK OF THE INTAKE JUST LIKE YOU SAID. ITWAS A VALVE ON THE BACK OF THE INTAKE, LOOKS LIKE IT... Trouble codes: P0300 (random misfire), P0171 (lean bank 1), P0174 (lean bank 2).
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