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Prev Professional Automotive Repair Technical Discussions for March 6, 2008
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L Unknown VIN: 3G5DA03E82
Car came in as no start. Tested system with a 500xl midtronics and found the alternator was not charging. Installed reman alternator. Car left with alternator charging and everybody happy. One week later car is back. The dashboard lights will flicker bright an...
1993 Cadillac Seville STS 4.6L Transaxle input sensor VIN: 1G6KY5294P
Customer says that the car bogs down rite about 40mph and check engine lite comes on. check for codes and p056 come up Tranaxle inputsensor cuirt problem.I hooked the scanner up and the transaxle input rpm signal goes to 0-56rpm when it acts up when it should ...
1994 Chevrolet S10 LS 4.3L No Start VIN: 1GCDT19Z0R
Vehicle has no injector pulse width cold. Replaced fuel pump, processor, tbi assembly, and pick up coil. With injectors unplugged has pulse width when plugged back in loses pulse width. Voltaged dropped grounds and power at processor no problem found. Checked ...
1996 Chevrolet Tahoe 5.7L transfercase VIN: 2GNEK18R0T
Complaint is a loud snapping noise in reverse with wheel turned to right in 4 wheel high.The rear diff. is non locking.We checked that all tires were the same size.Pulled the tail off the transfer case to check that the snap ring was not broken,its ok.Removed ...
1997 Chevrolet K3500 Cheyenne 6.5L abs VIN: 1GCHK33FXV
This vehicle came in with codes C0022, C0026, C0037 and no abs lights on. The lights come on with key on engine off for a few seconds. All the wheel speed sensor readings on the scanner were all very erratic. I cleared the codes and road tested - it did not re...
1999 Chevrolet Silverado 1500 4.3L brake lamp VIN: 1GCEK19V2Y
this truck is aggrivating and very sporadic the brake warning lamp with flash sometimes only a few times while driving and sometimes will go a day without acting up, have tested all mecanical switches and contacts and found nothing obvious wring fluid level an...
2000 Chevrolet Silverado 1500 5.3L abs VIN: 2GCEK19TXY
Customer came in complaining of the ABS kicking in at low speeds causing the brake pedal to go to the floor. Found rust problems on both front ABS sensors so we replaced both hub assemblies. The problem seemed to be fixed, but now she says it still happens ver...
2000 Chevrolet Cavalier 2.2L engine temp VIN: 1G1JC5240Y
the first thing we did was to scan the engine for codes(no codes), and compare the temp gauge to the scanner temp. after 8 minutes the temp on the gauge reads 210 and the scanner reads 213. if we let it run 10 more minutes it will run to 223 and the fan will c...
2001 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 1GCEK19V01
checked for vaccum leaks none found,fuel pressure in specs,o2 sensors working fine,this truck will have a pre ignition rattle on slight incline ,however if runing premium gas it will not do it, Trouble codes: P0171, P00, 174 (fuel lean bank 2)
2001 Chevrolet Silverado 2500 HD 8.1L all gears VIN: 1GCHK29G11
Customer says vehicle was parked for 2 weeks. Back from holidays & drove truck about 200 yds when speedo quit & lost gear indicator on dash, ABS light on & vehicle went into neutral. Towed to shop. MIL on & ABS lamp on. Performed tests, cleared code & road tes...
2002 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF52EX2
Vehicle initially came in with a code #P0442. Performed EVAP smoke test and initially could not find any source of leaks. Confirmed with Tech 2 scanner that vehicle's EVAP system is not holding vacuum. After further testing found vent solenoid is sticking and ... Trouble codes: P0442 (p0440-), P0440
2004 Chevrolet Silverado 1500 4.3L Misfire
Hard misfire on cylinders 2, 4, and 6. Replaced worn cap and rotor plus fouled plugs. The engine did not change. I checked the fuel pressure, which was 58 psi (55-62 range), with engine running. All cylinders have good spark. Injector balance test showed less ... Trouble codes: P0300, P0101
2006 Chevrolet Silverado 3500 LT 6.6L No Start VIN: 1GCJK33D86
I have a customer that just bought this 2006 K3500 6.6l duramax truck at an auction yesterday. It was sold "as is" because it won't start. He had it towed to my shop to have me get it running. I don't have any experience with the Duramax but I have worked on t... Trouble codes: P0336
1994 Oldsmobile Cutlass Cruiser 3.1L Dash lights, alternator VIN: 1G3AJ85M5R
I have a problem with the charging system on this Olds, after about 10 mile the air bag, abs, charging, and the check engine light comes on, the output is 15.9 to 16.6 volts, car runs rough, transmission wont shift, I've replace the neg. battery cable to the t...
1994 Pontiac Grand Am SE 2.3L No Start, Cuts out, Stall VIN: 1G2NE5533R
when this car first came in it started fine it only stalled out when put in gear, installed new tcc solonoid. now it won't start at all. although it did start once it died and hasn't started since. I installed new crank sensor because I wasn't getting rpm sign...
1998 Pontiac Trans Sport Montana 3.4L Poor Fuel Economy, MIL Lamp on VIN: 1GMDX03EXW
This transport is testing me good, I like a challenge but not when we are busy. This 98 Transport montana has a code po172 system too rich bank 1 stored in memory. STFT -2 LTFT is -18 at idle @ 1200 rpm the STFT -14 LTFT -2 and above 1500 rpm STFT -2 LTFT -18.... Trouble codes: 172 (System too rich bank 1)
1999 Pontiac Grand Am SE 3.4L Fuel Gauge,Odometer VIN: 1G2NE52E6X
I have a inoperative Fuel Gauge(Stuck On Empty,(new sender) & odometer does not change(speedometer works correctly)I have 5V at the purple wire at the sender & a good ground.I added a 150 resistor between the two & still no change in the gauge..Checked all PCM...
2000 Pontiac Firebird Formula 5.7L Poor Idle Quality VIN: 2G2FV22G3Y
Quick question to run past any Pontiac techs. Is it normal for fuel pressure to flucate rapidly while engine running on this vehicle? (Pressure in specs and no leak down) This vehicle has always had a slight misfire/rough idle concern. Have previoulsy replaced...
2000 Saturn LW2 3.0L fuel gauge VIN: 1G8JW82R0Y
This Saturn came in with complaint of fuel gauge problem. When we got in it was reading empty and low fuel light was on. Attach Tech 2 scanner and it showed 2 gallons in tank. Customer stated that tank should have 1/2 or better according to distance traveled b...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal LS 3.8L right front VIN: 2G4WB52K5W
I received a bunch of replies on this one and want to thank all of you. The fix ended up being something we thought about, but never addressed. The starter drive gear would swing out on right hand turns. The gear would hit the flex plate and cause the noise. T...
1985 Chevrolet Camaro Berlinetta 5.0L Hesitation, MIL Lamp on VIN: G1FP8741FN
1997 Chevrolet K2500 Cheyenne 7.4L timing chain VIN: 1GCGK29JXV
The fix was to replace the gear on the distributor. I feel like I wasted everybody's time. I should have checked it when I had the distributor cap off. It would have just taken a moment to attempt to turn the shaft, and find that the problem was there, not u...
2004 Chevrolet Silverado 2500 HD 8.1L driver info. center VIN: 1GCHK23G54
thankyou for yur input fellas' the ipc needed programming. I found out after the fix that the chevy dealership across the way installed a new IPC, but it appears that they didnt program it. once again thankyou for the back up, the boss is happy again.
2006 Chevrolet Silverado 1500 LS 5.3L encoder motor VIN: 2GCEKL13TO
This post was for informational purposes only. Hopefully someone gets some use out of it.
1996 Pontiac Grand Am GT 2.4L No Start VIN: 1G2NW52T7T
well this one is finally down the road! replies were very light to say the least, however i dug deeper into the fix database and found that fixes are pretty much scattered around between catagories. example: the information i found that helped fix this car i f... Trouble codes: 1629 (incorect password from ipc to pcm).
1999 Pontiac Grand Am SE 3.4L Fuel Gauge VIN: 1G2NE52E6X
I received alot of useful information on this problem ,I am unable to isolate the problem though.It is unfair to the customer to have her vehicle for the amount of time that I had so I referred her to the dealer they are more fimilar with these problems & have...
1997 Saturn SW1 1.9L Misfire, MIL Lamp on VIN: 1G82H8288V
After posting an update I received several replies saying the intake gasket was a likely problem. I sprayed carb cleaner around the intake near cylinder 2. This didn't make any change in idle RPM. I also checked compression and it was 180. The customer h... Trouble codes: P0302 (cyl 2 misfire).
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