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Prev Professional Automotive Repair Technical Discussions for August 16, 2012
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet S10 LS 4.3L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1GCCS19W4R
Customer Brought Truck In For Misfire. During Tune Up Noticed Plugs On Bank1 Were Black. We Checked Timing And Seems Good. We Also unpluged Idle Air Control Valve And No Change Noticed?? Thought Idle Should Have Changed. Cannot Communicate with PCM. Pin TGeste... Trouble codes: N0, C0DES
1998 Chevrolet S10 LS 2.2L pump VIN: 1GCCS1947W
Thanks in advance for any help. I rebuilt this unit in march of this year replacing the, converter,sunshell,low oneway sprag, the foward oneway and band with clutchs.it test drove fine and was delivered to cust. in april it came back with a noise and a flared ...
2000 Chevrolet Express 3500 LS 5.7L Poor Idle Quality, MIL Lamp on VIN: 1GBJG31R3Y
I have a problem, I am not sure what. Symptom was vehicle idling rough at times. Code was set for lean bank 2. I watched the scanner, and thought this was easy. The voltage on Bank 2 Sensor 1 would jump intermittently to 4 millivolts, and then back up to norma... Trouble codes: P0174 (Lean Bank 2)
2005 Chevrolet Silverado 2500 HD 6.6L Drive line VIN: 1GCHK23295
Customer came in for new tires and alignment. We replaced the tires and did the alignment. A week later the customer comes in complaining about a bad tire cuasing a vibration as it didn't vibrate with the old tires. Upon test driving we determined it was a dri...
2005 Chevrolet Tahoe LS 5.3L Misfire VIN: 1GNEC13Z25
Recuring misfire #3 condition. Replaced plugs and coils. Vehicle has been is several times for the same problem. Any suggesions? Thanks in advance. Trouble codes: P0303 (Misfire cylinder 3)
2008 Chevrolet Silverado 1500 WT 4.8L Cuts out, Stall, Loss of Elec. Power VIN: 1GCEC19C18
The truck will cut off very briefly while driving at cruise speed. The check engine light will blink on (less than 2 seconds) and then go off. The radio & a/c control will also blink off/on when fault occurs. The a/c will revert back to fresh air from recirc w...
1999 GMC Safari SL 4.3L air flow VIN: 1GKDM19W9X
hi have 99 gmc safari replace a/c comp /dryer /orfix/ van came in for oil leak only cust then wanted a/c fix comp was lock up after all repairs all check good except air flow coming from vents at high blower only goes about 15 inch from vent have check for vol...
2000 GMC Safari SL 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEL19W5Y
I have a 00 Safari running very rough at idle. Shows misfires on # 1 and 4, mostly on # 4. Fuel trim Bank1 st -7,lt -3 Bank 2 st -30 lt -3 at idle. Fuel pressure 62 at wot, it isnt dropping when shut off. Did injector flow test and all were even drops. 02 stay... Trouble codes: P0300
2000 GMC Jimmy Diamond Edition 4.3L Hesitation, Cuts out VIN: 1GKDT13W0Y
Please help, tired of acting like parts changer. per our fuel psi tests all readings too low(58 koeo, 52 koer (idle), 56 psi koer wot. o2 sensors go to zero b1 26 b2 fuel trims way lean when accelerate heavy or wot. unplugged mass air flow although gm/sec rise... Trouble codes: P0131, P0135, P0143, P0151, P0300
1992 Oldsmobile Cutlass Supreme S 3.1L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1G3WH54T0N
this car has a dip in hesitation and Idles very rough when hot. I replaced plugs and wires with AC parts and an oxygen sensor witch helped with my o2 readings but not with the way it runs. The the Integrator numbers run about 90 - 100 at Idle but go up to 126 ...
2005 Other GM american her 500CID compressor
make is fleetwood , american herritage motorhome, diesel pusher vin [...] compressor not energising, has volts in and out at relay, compressor test good. have no wiring diagrams for this vehicle. is the signal from t...
2005 Pontiac Sunfire 2.2L instrument cluster VIN: 3G2JB52F85
Hi all. This Sunfire came in with a complaint of the instrument cluster gauges inoperative. The theft, temp/fuel, and "service vehicle soon" indicators are lit up. All modules showed U-codes U1000, U1016, U1088, U1096, U1128, U1301. I cleared all codes and roa...
2003 Saturn Vue 3.0L no power steering VIN: 5GZCZ63B73
This Vue came in with no power steering, i have checked with a tech II scanner, there is no DTC's. All the data is good except it says the vehicle is not running when it is, I have checked for good power and ground and it is good, it will not send power from t...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Chevrolet Avalanche 1500 5.3L Unknown VIN: 3GNEK13T42
We removed the intake manifold and the valley cover and see parts of the camshaft. The very back lobe on the cam is pitted and feals rough. we told the owner they would need a cam and lifters but they want a complete engine. There are a lot of these engines ou...
2006 GMC Sierra 2500 HD SLT 6.6L Unknown VIN: 1GTHK23D96
Only three replies on this one. Customer decided to have us clean off the oil and reinstall his OE air filter box and intake. Possible plugged K&N filter causing the problem. It has been two weeks and no signs of leakage from the EGR.
2001 Oldsmobile Aurora 3.5L Mode switch VIN: 1G3GR64H41
Ok, to get this switch out the transmission should be removed from the car. One post said it could be done in car but it was a pain. The park pawl rod is attached to the shaft linkeage and in order to get it apart you have to remove 4th clutch and the drum ben...
2003 Saturn Vue 2.2L No Start VIN: 5GZCZ23D43
I was waiting a little while before closing this post as the problem was intermittent.After talking to customer about what lights were on and what functions were not working,we decided to replace the BCM.Customer had stated that,DRL were still on after vehicle...
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