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Professional Automotive Repair Technical Discussions for February 6, 2009 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2001 Buick LeSabre Custom 3.8L Extended Crank VIN: 1G4HP54K02 This vehicle has an intermittent extended crank, but happens alot. The ignition is firing but has no injector pulse. When the injectors start to pulse the engine starts right up. The CKP & CMP signals to the ignition module and PCM look good and are present du... |
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| 2003 Buick Century Custom 3.1L Starting VIN: 2G4WS52J63 Hello to all I've got a no start on an 03 Buick hope someone can offer some assistance. Car initally came in for a rough run condition, car was due for a tune and had a moderate leak from the intake. Intake manifold gaskets replaced and tune components. Upon a... |
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| 2007 Cadillac STS 4.6L Poor Idle Quality VIN: LSGDE53A67 1.normal maintenance .clean electronic throttle 2.The engine is started ,this one idling is normal for cold engine. 3. the engine idling is abnormal for hot engine. Because is higher than the normal idling .then on the driving test about 3 hours,the engine idl... |
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| 1999 Chevrolet Tahoe 5.7L Mechanical VIN: 3687779797 Rocker stud is broke off on Cylinder #5. Valves are not bent, ran leakage test. How do i remove these studs please, head on if possible. Are these pressed on , and how will i install the new one?? Thankyou. |
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| 2001 Chevrolet Impala LS 3.8L Charge Lamp,ABS Light,Brake Light,Air Bag Light VIN: 2G1WH55KY1 Vehicle came in with intermittant lights on dash flashing.All four lights flash every second for (4) flashes then off for (3) seconds.While lights are flashing the alternator is putting out appox 14 volts.No codes in any computer.I have replaced the battery & ... |
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| 2001 Chevrolet Silverado 2500 HD 6.6L cooling system VIN: 1GCHK23151 this truck came in and customer says it is pushing coolant out overflow checked coolant level was low topped off and installed pressure tester it will rise to peg out in about 15 min. seemes to slow for compression? ran cumbustion leak test on cooling system ... |
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| 2002 Chevrolet Impala 3.4L high idle At start up this vehicle's IAC counts are 38 (normal) then steadly increase to 230 counts (3500 rpm) within two minutes. Using Tech 2 RPM does not change when I command IAC up or down. Fuel trims are at 0% +/- 3%. Fuel pressure is at 45psi, regulator is not le... Trouble codes: P0507 |
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| 2006 Chevrolet Silverado 1500 LS 4.3L Air Bag System VIN: 3GCEC14X96 Waiting on a pack of 2 ohm resistors to try and bypass/test the fault point. Has anyone seen a bad airbag or contrrol module on this new of a vehicle? Seems to act up cold. The light went out for about two hours after replacing the drivers connector but came b... |
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| 2001 GMC Jimmy SLE 4.3L Headlights VIN: 1GKDT13W71 Good Morning Folks, This is more of a retrofit question than a request for repair help. This vehicle has what GM calls a zenon lighting system for the low beam headlights. I was wondering if anyone knows of a way to change this setup to regular halogen headlig... |
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| 1999 Pontiac Grand Am SE 3.4L Starting VIN: 1G2NE52E9X this car was hauled in with very little imformation. colege girl her dad trailered it to me. intermitant no start. started with the basics, good spark , fuel pressure 43psi koeo. crank rpm present. being a 3.4 was unable to check injector pulse at injector eas... |
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| 2001 Pontiac Grand Am SE 2.4L No Start, Poor Idle Quality, Cuts out VIN: 1G2NF52T41 car came in for a no start. found intake manifold full of gas. traced problem to a blown fuel press reg. replaced reg and installed a new set of plugs. checked comp when the plugs were out and car had #1,190psi,#2,180psi#3,180psi,#4,180psi. so after replacing ... |
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| 2002 Pontiac Grand Am SE 3.4L Radiator VIN: 1G2NF52E42 After intake gasket replacement low interior heat and bottom radiator hose stays cool. Try to bleed cooling system with one bleeder we found no help. Not sure we got all air out of radiator. What is procedure for bleeding cooling system? |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1998 Cadillac Seville STS 4.6L power windows VIN: 1G6KY5495W This car is in limbo for now. During the course of trying to find the root cause of the electrical problem I found that the wiring under drivers side was under water. They must have a water leak somewhere, probably in the sunroof, and I didn't want to go any f... |
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| 2005 Cadillac Escalade 6.0L Ride Control VIN: 1GYEK63N85 Thanks everyone for the info and help. Never did find anything wrong with the vehicle, checked drive shafts and CV axles and nothing. Customer decided to trade it in. |
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| 1995 Chevrolet Monte Carlo Z34 3.4L engine WOULD LIKE TO THANK ALL THOSE THAT POSTED HELPFULL INFORMATION. AT THIS TIME THE PROBLEM STILL IS NOT SOLVED, IF AND WHEN I DO FIGURE THE PROBLEM OUT I WILL POST THE SOLUTION. |
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| 1995 Chevrolet Lumina LS 3.1L Stall, MIL Lamp on VIN: 2G1WN52M3S Swapped throttle body, ECM, module@ coil pack, 3x sensor , MAP sensor and the EGR from a donor car.I noticed after the car had cut off, my MAP voltage would be .002. You could cycle key back on , it would read 4.85 v. The MAP code would be the only code to re... Trouble codes: 76 (history egr 2), 77 (history egr 3), 34 (history map), 23 (history iat), 28 (history trans. range switch). |
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| 1995 Chevrolet Blazer 4.3L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13W3S Well, just as mentioned in my update, this truck is fixed. I found a bend pushrod and valve. This would have caused the low vaccuum, which would have caused the rich mixture. I realize I wasn't very clear about checking under the plenum. I did actually pul... Trouble codes: P0300 (Random Missfire detected). |
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| 2000 Chevrolet Express 2500 5.7L Cuts out, MIL Lamp on VIN: 1GCGG25R3Y Congrats to all those who mentioned the distributor. The wires might have been old, but it was indeed the distributor. The customers installed the wires and plugs last week and said there was no change. I got a new Dorman distributor (P/N 690-902) for it thi... Trouble codes: P0171 (Fuel system lean B1), P0174 (Fuel system lean B2), P0340 (Camshaft position sensor problem), P0341 (CKP circuit out of range). |
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| 2002 Chevrolet Tahoe LS 5.3L Poor Idle Quality, Stall VIN: 1GNEC13Z82 I HAD checked all the replys that was sent when the vehicle was in the shop the first time. The customer has not returned it to me He wants to do the work himself I guess because He asked me question and then puts on parts. I have not seen the tahoe since m... |
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| 2002 GMC Sierra 1500 SL 5.3L Hesitation, Cuts out, MIL Lamp on VIN: 2GTEK19T32 sorry about the delay after checking everything i checked fuel pressure which i should have done first found it only had 4 lbs and then customer told me he had just replaced it like 1 month ago so it was the fuel pump was a cheap one thanks to all who helped ... Trouble codes: P0171 (system to lean bank 1), P0174 (system to lean bank 2), P1133 (02s circuit insufficient switching bank 1 sensor 1), P1153 (02s circuit insufficient switching bank 2 sensor 1). |
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| 2002 GMC Envoy SLE 4.2L head gasket VIN: 1GKDT13S32 THANKS FOR ALL THE INFO. AFTER WE INSTALLED ENGINE OIL DYE AND TEST DROVE EXTENSIVLEY WE FOUND A PIN HOLE IN THE HEAD ABOUT A INCH. UP FROM THE BLOCK SERVICE IN THE CHAIN CASE AREA BEHIND THE ALTERNATOR. WE INSTALLED NEW HEAD. |
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| 1998 Oldsmobile Bravada 4.3L no start VIN: 1GHDT13W8W after a lot of problem starting , the fix was the ignition switch, we were loosing voltage to the crank sensor... done. steve [...] aam/cmt. |
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| 2001 Oldsmobile Intrigue GX 3.5L 3rd to overdrive (4th) shift VIN: 1G3WH52H51 Removal and dissassembly confirmed what everyone thought. The 4th gear drum had worn teeth (almost none). replaced with GM Goodwrench transmission with updated parts. This rebuilt transaxle offers the customer a 36 month/100000 warranty. |
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