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Prev Professional Automotive Repair Technical Discussions for January 7, 2008
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Open Help Requests for GM
Help Request Answers
1991 Buick Regal Custom 3.1L No Start, Stall VIN: 2G4WB54T2M
Hello all This car came in and will not run. It starts and dies. Will run only long enough for idle to flare up and dies. Will do this repeatedly. Cannot keep it running with accelerator.Fuel pressure holds steady, no codes in system. Car is not equipped with ...
2000 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD54Y4Y
car came in with an intermittent rough running problem and the mil on. pulled codes and p0300 was there. misfire data had 9100 counts on #3cyl and between 100 and 700 counts on #1,5,7. Of course it was running fine at that time and the rest of the day. the coi... Trouble codes: P0300
1991 Chevrolet Lumina Euro 3.1L No Start, injectors always on VIN: 2G1WN54T4M
Car was towed in, batt dead, no start. Charged and tested batt. Engine started but was very rich. Oil was way over full with fuel. Changed oil and restarted. Seemed to clear out. We let idle for about 1/2 hour. It seemed to run fine on a road test until I came...
1996 Chevrolet K1500 5.7L High Idle VIN: 1GCEK14R9T
complaint hi idle all the time. Scanned data and koeo iac count is 180 start vehicle and iac count goes to 0. If I close off bypass air supply at throttle body I can regulate idle. Iac stay fully retracted all the time even when vcm commands to 0. Ohm all 4 wi...
1998 Chevrolet Venture 3.4L Cooling Systems VIN: 1GNDX03E8W
We have this venture that came in with the complaint that the temp gage was going hot. We bled air out of the bleeders and test drove down the highway and all was good (10 mile test drive after warm). Intake gaskets were leaking badly and were sold along with ...
2000 Chevrolet Silverado 1500 4.8L engine VIN: 1GCEC19V1Y
I want to change the engine from a 4.8 to 5.3 Iam trying to find out what needs to be changed or modified beside the engine and reprograming the ecm.
2001 Chevrolet Silverado 2500 HD 6.6L engine VIN: 1GCHC29151
I need advice on how to best repair this customers vehicle. We are not a diesel repair facilty. Customer used starting fluid to start vehicle after changing fuel filter. Engine rev'ed really high and bent push rods and shattered t-bar tappet pad. Leak down tes...
2001 Chevrolet Silverado 2500 6.0L 2-3 shift VIN: 1GCHK29U21
Hi all, this should be for the GM tranny guys, cust. came in with slippage complaint, found fluid burnt, slippage in most forward gears.R&R and overhaul with all new components including electronics, o/h kit , etc. Unit worked great for about 2 weeks, then cus...
2001 Chevrolet Malibu 3.1L theft system?? VIN: 1G1NC52JX1
typical no start due to malfunction of the theft system. reset and starts. but keeps recurring. anyone know the answer to this problem??
2001 Chevrolet Suburban 1500 5.3L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 3GNEC16T81
hello, i have a suburban that has long term fuel trims in upwards of 25%. has new o2 sensors(factory), fuel pump has been replaced and fuel pressure regulator also.(fuel pressure is still borderline while it's running, but i also dont have a running spec) and ... Trouble codes: P0300 (random missfire)
2002 Chevrolet Silverado 1500 4.3L coolant in oil VIN: 1GCEC14W62
Happy Monday everybody have this pick up in and I'm feeling real sorry for this guy "if it wern't for bad luck " Well you know the rest. Truck came in for oil leak and we checked the level ( Overfull) and leak from what looks like the front seal for the oil pa...
2003 Chevrolet Impala 3.4L Chime/Beep VIN: 2G1WF52E93
This vehicle will chime or beep 3 times every 2 minutes, no matter what. Key on engine off, key out doors closed, key on engine running, driveing down the road. Every two minutes you get a series of three beeps a two minute pause and three beeps again and so o...
2004 Chevrolet Silverado 2500 6.0L Antitheft VIN: 1GCHK24U14
I am posting this to avoid a future problem. I need to install a complete steering column assembly into this truck. The donor vehicle will be from a 05 from the salvage yard. If I change over a complete steering column assembly with key, will I have to reprogr...
2004 Chevrolet Cavalier LS 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JF12F44
#4 spark plug fouled so all were changed. still has a definate misfire and the #4 cylinder is wet with fuel. Scan tool can and does show #4 misfiring constantly. #4 injector scopes comparably to other three cylinders. Using aux plug wires I switched #1 and #4 ... Trouble codes: P0304
2005 Chevrolet Express 1500 LS 5.3L Transfer Case VIN: 1GCFH15T95
I wonder if our shop is the only one experiencing failures on the 4473 Transfer case. We have a lot of failures, some repeating on the same truck. There is a TSB at Chevy only, not in Alldata or Shopkey or Identifix. TSB # 1912909 and it states to change the r...
1999 Geo prism 1.8L MIL Lamp on VIN: 1Y1SK528XX
Hi to all the geo specialist out there. This vehicle came to us about one month ago with codes po446 & po441. After running several tests we replaced the canister assembly in the rear of the vehicle & that fixed the code po446. But I am still dealing with the ... Trouble codes: P0441
2002 GMC Envoy SLE 4.2L No Start, MIL Lamp on VIN: 1GKDT113SX
while driving cust stated that reduced power light came on then vehicle died in flight.10 codes in vehicle memory on initial check out, cleared codes and p1220 reoccured instantly.followed flow chart and replaced throttle bore assy. code reoccured again tested... Trouble codes: P1220 (tp sensor 1 or 2), P1514 (air flow correlation)
2002 GMC Envoy SLE 4.2L battery VIN: 1GKDT13512
battery is draining in 4 to 8 hours i did not measure milliamp draw because drain is very significant checked usuual light issues nothing found when i pulled 40 amp blower fuse drain was lessoned considerably this fuse is a hot all the time power to blower mod...
1999 Oldsmobile Bravada 4.3L transfer case VIN: 1GHDT13W8X
awd lamp on, code c0308. mitchell leads to replace encoder motor, code reappears c308. does not fix problem.
1999 Oldsmobile Alero GL 2.4L radio VIN: 1G3NL52T9X
Greetings and thank you in advance for any assistance you can provide in saving my butt this time. I put a new battery in this car, FORGOT the little power keeper (dummy me) and assumed (we all know what assuming does) the radio and everything else would work ...
2003 Pontiac Vibe 1.8L Battery VIN: 5Y2SL628X3
We have checked for battery drain multiple times and found nothing. The drain we see on our meter is 8 milliamps which is well within spec. The alternator charges 14v to 14.5v. I was just wondering if any of you fellow techs have encountered this problem. I ha...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Chevrolet K1500 Suburban LS 6.5L engine VIN: 3GNFK16R6W
well i did a leakdown jest cyl 2 and 8 failed called jasper they sent another shortblock installed and sent customer on his way i told him to come back in 500b miles and i will check the oil but it should be good i did a leakdown before i sent it out thanks ag...
1999 Chevrolet Astro 4.3L Hesitation, Stall, Misfire, MIL Lamp on VIN: 1GNDM19WOX
2001 Chevrolet S10 4.3L MIL Lamp on VIN: 1GCDT19W9I
ALL THE RESPONSES WERE FOR A PLUGED CANISTER, OR SECOND FAULTY VALVE. IT TURNED OUT TO BE A FAULTY FUEL PUMP VENT/ROLLOVER VALVE. FUEL PUMP HAD BEEN CHANGED A COUPLE OF MONTHS AGO, SO THE CUSTOMER WHEN BACK FOR WARRANTY. Trouble codes: P0446 (The PCM sets this Diagnostic Trouble Code DTC if the evaporative system vacuum decay rate is more than a predetermined value.), P0449 (If the PCM detects an incorrect voltage for the commanded state of the fuel tank vent driver Diagnostic Trouble Code DTC P0449 sets. History only never current.).
2004 Chevrolet Silverado 2500 6.0L Differential VIN: 1GCHK24U14
Thanks everyone for your suggestions. From what most have said it is normal to have quite a lot of play between the crossshaft and the spider gears. I have decided to reuse that ones I have. Thanks
2001 GMC Safari SL 4.3L Poor Idle Quality, high ilde VIN: 1GKPM19W71
This was any eay fix, but did not have enough customer information and were not driving as the customer would to diagnose properly. Problem was the vehicle had to be at wide open throttle then cruise was set. The idle was not sticking, it was wide open and h...
1995 Oldsmobile Cutlass Ciera 3.1L hazard flashers VIN: 1G3AJ85MXS
Well, another day in happy valley. Thanks to all the responded, sometimes you just get lucky. Another customer got picked up this morning by a friend who just happened to be driving a cutlass ciera!! Turned on their has flashers, and lo and behold clicking c...
1999 Oldsmobile Bravada 4.3L low pedal VIN: 1GHDT13W9X
Finally fixed it. I ended replacing all the caliper bushings made sure calipers were free replaced front and rear pads ,turned rotors and bled with a power bleeder and brakes work fine now .i just wasn't sure about abs causing this because they still activated...
1996 Pontiac Grand Am SE 2.4L No Start, Poor Idle Quality, Stall VIN: 1G2NE52T3T
Thanks for all your help. I removed the "battleship" , the coil housing, and inspected. There was carbon tracking and two of the plug boots were very corroded. I also replaced spark plugs with correct AC plugs. No more kick back and fail to start.
1997 Pontiac Grand Am SE 3.1L Poor Idle Quality, Misfire, Poor Fuel Economy
Thank you people for your advices, here are some of the causes I was receiving from you. 1. tight valves 2. bad O2 sensor 3. EVAP lines leak 4. bad spark plugs 5. clogged injector 6. valves not seating right 7. burned intake valve 8. weak valve spring 9. egr ... Trouble codes: P0300 (pendin code random misfire).
2002 Saturn Vue 3.0L No Communication VIN: 5GZCZ63B32
Sorry I ment to amend this 2 weeks ago. I'll do that first. Further testing and a couple of days later we ran into a similar communication issue problem. This time on a 2000 Cadillac Catera. Same issue. NO communication w/PCM or ABS. Generic info only. ... Trouble codes: 300 (Random Misfire), 301 (Cylinder 1 Misfire), 303 (Cylinder 3 misfire), 700 (Transmission failure code sent to PCM).
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