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Prev Professional Automotive Repair Technical Discussions for December 9, 2004
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Open Help Requests for GM
Help Request Answers
1992 Buick LeSabre Custom 3.8L battery light VIN: 1G1JF51T6R
Car came in with battery light on, interior light on, and radio inoperative. Found fuse #11 blown replaced fuse test drove vehicle, fuse blows again after about 5 minutes of operation, fuse will not blow unless car is driven,did try another atlernator same pro...
1996 Cadillac Eldorado 4.6L Misfire VIN: 1G6EL12Y1T
this is a recurring problem - at 94,ooo we replaced plugs & plug wires (ac plugs & wires), had p0300 at that time & misfire counter showed # 3 way up there. at 110,000 mi p0300 showed up again (misfire counter showed #3 again), plug had carbon tracking on porc... Trouble codes: P0300
1999 Cadillac Escalade 5.7L ride control VIN: 1G4EK13RXX
when you are driving this vehicle the steering wheel will go to eather side and start drifting. this vehicle has been aligned and all steering comp. have been checked for play and nothing was found. are there any problems with this vehicle that i do not know a...
1990 Chevrolet Corvette 5.7L Possible flywheel VIN: 1G1YY23805
Customer has been to several other shops due to a noise complaint. When vehicle is cold, it operates normally. Once the engine has warmed up, howver, it makes a knocking noise. The noise goes away when the vehicle is reved up and will return after two to three...
1995 Chevrolet K2500 6.5L Clutch VIN: 1GCGK29F0S
Truck came in for intermittent hard shifter engagement sometimes had to shut truck off to engage,replace worn pivot ball and clutch fork (never greased)was great for a couple of weeks now it appears to be doing the same thing except when hot,Any one run into a...
1995 Chevrolet Camaro Z28 5.7L Mechanical VIN: 2G1FP22P25
customer just bought this camero for his son that had it for two days before overrev caused rod brg to turn. alldata shows this engine coming out from the bottom as a assembly. my question is has anyone ever taken it out from the top. a site called the happy h...
1996 Chevrolet Camaro Z28 5.7L Poor Idle Quality VIN: 2G1FP22POT
hi guys,i have a camero with a hunting idle,i did a full tune up and shortly after it started hunting.if i unplug the iac it will not hunt. i have tried a new mass air flow,intake tube,egr valve. it has a new fuel pump and rebuilt transmission and ignition swi...
1996 Chevrolet Caprice Classic 4.3L Hesitation, Surge, Stall VIN: 1GBL52W1TR
Time for all the people from up-north to come back and drive their cars..This car has been sitting for approx 4 months After starting car driving around block customer states that on a slow accel from a stop that car surges and bucks. Drove vehicle found to be...
1996 Chevrolet Blazer 4.3L Misfire, MIL Lamp on VIN: 1GNDT13W2T
Merry Christmas! I have a 96 blazer that I am having a tough time with. P0340 (cmp) and p0300 come up from time to time, and when driving you can see the misfires count up.So far I have scoped the cam and crank, also both together while driving, and patterns l... Trouble codes: P0340 (cmp sensor curcuit), P0300 (multiple cylinder misfire)
1997 Chevrolet C1500 5.7L MIL Lamp on VIN: 2GTEC19RXV
This pickup came in with a check engine light on. Customer said his transmission indicator light did not function and the tack was not working. It felt to him like the trans did not shift down from high gear. Next morning when he started it the service light w...
1998 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GBFG15R6W
This is an emissions failure... Replaced PCM and tested all ground circuits to PCM Replaced TPS and re-wired circuit from TPS to PCM Replaced MAP Sensor/MAF Sensor/Fuel tank pressure sensor/both rear O2 sensors/both catalytic converters. While running drive tr... Trouble codes: P0121
2002 Chevrolet Impala LS 3.8L hard start VIN: 2G1WH55K82
verified has an intermittant long crank to start. checked for codes, tsb's, updates, none found. checked fuel pressure, volume and bleed off-ok. replace fuel pressure regulator just 'cuz, no help. checked air filter and exhaust-ok. scoped ckp and cmp ckts at i...
2004 Chevrolet Optra 2.0L Forward gears VIN: KL1JK52ZX4
Hello everyone. I have Reverse But no forward gears unless I disconnect the TCM. I am really stuck on this one..I've been in touch with Technical assistance with this, that's how the valve body was replaced.There isn't much for diagnosis help with these trans....
2000 GMC Yukon Denali 5.7L brake pedal VIN: 1GKEK13R8Y
customer has brought this vehicle in 5 different times. each time after about 2 months the pedal is spongy and says pedal goes to floor. the master cyl. has been replaced twice with factory parts,no visible signs of leakage anywhere. this is a disc & drum setu...
1992 Oldsmobile 88 Royale 3.8L no spark VIN: 1G3HY5316N
Fellow Techs, This vehicle came in on the hook with crank/no start condition. Customer stated service engine soon light was flashing and engine was running poorly for several days, then it would not start at all. I jumped pins A&B on data link connector. The ...
1999 Oldsmobile Intrigue GL 3.5L Crank Sensor VIN: 1G3WS52H0X
Hello fellow techs. This Olds is eating my brain. I don't have a lot of domestic experience. Cranks/no start. Code P0385-Crank Pos Sen in system. I checked for power on red wire at sensor,no voltage. No voltage from PCM end of red wire either. All other power ...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Electra Park Avenue 3.8L Surge VIN: 1G4CW54C3L
I had several good replies: TPS glitch inspection, charcoal canister, misadjusted brake switch, EGR valve & ignition coil. One reply said to drive vehicle in 3rd gear and see if problem is gone, it was. I install an OEM ignition coil and redrove and problem wa...
1995 Chevrolet S10 LS 2.2L thermostat ? VIN: 1GCCS1943S
After double checking all the possibilities you guys suggested I test drove the truck and worked the engine. I immediately did a combustion leak test and did pick up CO2 in the cooling system. since we don't replace head gaskets I referred him to another shop....
1997 Chevrolet K3500 Cheyenne 7.4L Poor Idle Quality, Surge VIN: 1GCHK33J9V
After going back and checking Plugs/connectors which were all good and seated i went and checked the scan tool found a way off reading on the timing(dont remember excatly but was a - number and way off). I went back to square one..set motor on top dead center ... Trouble codes: P1345 (crankshaft/camshaft position sensor correlation).
2001 Chevrolet Impala 3.4L Headlights, battery light VIN: 2G1WF55E01
Well, after further checking of this system I found the body computor had 15 codes stored in it. Like the one gentleman said if it had 10 or more codes to replace the body control computor so, thats what I did. So far the car is fixed except now the air bag li...
2001 Chevrolet Silverado 2500 6.0L Timing cover/water pump VIN: 1GCGK29U41
Thanks for the 8 replies I recieved. Relaced the water pump gaskets and all is well. I appreciate the info guys! Thanks.
1994 Oldsmobile Cutlass Supreme 3.4L Poor Idle Quality, Poor Fuel Economy VIN: 1G3MR67XGR
I had several responses,most of which said intake leak. As the vehicle stayed overnight and was dead cold this morning, a rather large leak was easily found on back side of intake by #6 cylinder. When warm(even a little warm)it completely goes away and the tun...
1998 Oldsmobile Intrigue 3.8L noise VIN: 1G3WH52K5W
Thanks to all that replied.Found bad oring at pcv. But noise still there. Pulled trans. back out,found retaining washer where flywheel bolts go thru not properly welded.Reweld flywheel,reinstall trans.Ureka! noise gone. Thanks to all
2000 Oldsmobile Intrigue GL 3.5L Slip or extended shift VIN: 1G3WH52H4X
The customer chooses not to fix the vehicle at this time. We got some good suggestions. The consensus seems to be a sticking pressure control solenoid and or worn boost valves in VB. From the replies the surest fix is drop the pan and check for excess metal....
1995 Pontiac Grand Prix SE 3.1L lifters VIN: 1G2WJ12M8S
Hi guys & gals.yes it is fixed,i got 17 replies on this problem within 1 1/2 days.most replies recommended to to change oil again and road test or let idle off & on for 1-2 hours,1 even spoke of spun cam bearings.THANK YOU ALL for your input and helping to pul...
2000 Pontiac Bonneville SE 3.8L abs light & brake light VIN: 1G2HX54K4Y
I got 4 replies on this pontiac. Most said check for grounds or corrosion in connector. We did that and did not see a probnlem. After customer left to return home to Houston, we are in Dallas, we got an email about a hard to find ground on top of tranny. We we...
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