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Prev Professional Automotive Repair Technical Discussions for December 2, 2004
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Help Request Answers
1994 Cadillac DeVille 4.9L Poor Idle Quality, MIL Lamp on, idle to high VIN: 1G6KD52BOR
hi thanks in advanced for any help i have a 1994 cadillac sedan devile with po85 code i have removed throttle body and cleaned all passage ways and bores readjusted tps someone had previously adjusted idle base screw i also lowerd idle to spec and to o% thrott... Trouble codes: P0085
1988 Chevrolet K2500 Cheyenne 5.7L Hesitation, Surge VIN: 1GCFK24K3J
I am having problems setting timming on this rebuilt acdeco rebuilt eng . After instal found when timming was set to spec (0 deg tan/black disconected) caused code 43, low vac (14" at 2500 ft), poor power and hesitation. Re checked dampener marks with piston a... Trouble codes: 43 (esc sensor error)
1989 Chevrolet Cavalier 2.8L Mil Lite on VIN: 1GJF11WXK7
Hello Techs I have a 1989 Chevy Caveler it belongs to my Landlord. I am trying to do him a favor and repair this for him. He said Check eng light came on all the sudden he was having no drivability problems.I ck for codes found Code 43 my book says it a Knock ... Trouble codes: 43 (My manual says it a Knock sensor code)
1989 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality VIN: 2GCEC19K1K
Have this pickup that has been all over town and no one has been able to fix it. it recently had engine rebuilt as well as transmission replaced several weeks ago. the original customer complaint was that the idle is high and intermitently while slowing to a s... Trouble codes: 24 (vss circuit problem), 43 (esc circuit), 45 (system rich)
1990 Chevrolet Lumina 3.1L speedo VIN: 2G1WL54T4L
Car was brought in with no speedo signal output on dash.. Test drove with scanner to look at vss signal input and found no problem. Brought back into shop and checked square wave output from ecm and yes i do have a signal but only .50 volts . Checked all power...
1993 Chevrolet S10 Blazer Tahoe 4.3L Hesitation, Misfire, shutter on accel VIN: 1GNDT13W8P
Hello all, This vehicle has a miss (shudder) on accel in gear. The plugs & wires all look ok on the scope both at idle & under in gear load test. Removeal & visual checks show #3 plug has some black on the insulator. All other plugs still look new. #3 cyl show...
1993 Chevrolet Top Kick 366CID exhaust leaks VIN: 1GDJ6H1P8P
1993 gmc topkick 6 wheeler...like a u haul truck. Replaced one exhaust manifold w/new gasket. Both sides continue to leak. No matter how many times you tighten bolts or replace gaskets. Any suggestions ? 2 gaskets ? Head warped ? Anybody had this problem befor...
1997 Chevrolet Cavalier 2.2L Excessive Emissions, No Start, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 1G1JC5246V
Hello to all and merry christmas. I have a real problem child here I will try to be short. I inhereted this vehicle from another tech in the shop. Car came in running as if the exhaust was plugged,loading up no acceleration and sometimes not starting unless ho... Trouble codes: P0341, P0335, P0300
1997 Chevrolet S10 4.3L Stall
Hi all, For the first time ever I'm about to quit on a vehicle. This Jimmy came to me with an intermittent stall at idle. It stalls only in closed loop, for no apparent reason. It stalls like you turned the key off. Crank sensor appears normal with a good...
2000 Chevrolet Astro 4.3L solenoids for door locks VIN: 1GNDM19W4Y
This is a strange one: the solenoids actually get slower and slower every time you press any of the switches. They get down to a slight wiggle when they get to this condition. If I wait a couple of minutes, they seem to revive and work (at least the ones that ...
1999 GMC Sonoma SL 2.2L Hesitation, Cuts out VIN: 1GTCS1444X
truck came in with a hesitation and MIL illuminated. checked plugs, were good old bosch platnum +2. number one took some threads out with it, so we replaced all the plugs and fixed the #1 plug hole. Put back together and still missed. found the injector for #1... Trouble codes: P0300 (random misfire)
2003 GMC Savana 2500 6.0L none VIN: 1GTGG25U03
van came in with abs & brake light on,checked abs system for codes and i found a c0550 code. i cannot find any information on this code. i have tested all wheel sensors and checked brake lights,and all fuse.if anybody have any information on this code please h...
2003 GMC Envoy SLT 4.2L Transmission VIN: 1GKDS13S83
Hopefully I can get pointed in the right direction When vehicle is driven, The ABS lamp will illuminate & the transmission will default into 2nd gear & stay there ??? intermitantly If anybody has any ideas ??? THANK YOU JOE
1993 Pontiac Bonneville SE 3.8L starter VIN: 1G2HZ52L6P
Help!! my batting average is falling fast with this intermittent problem! this 93 bonneville SSE will about once every 2 days fail to crank over- we verified that when this occurs,we get no power to the neutral switch on the transmission- the security light on...
1998 Pontiac Sunfire SE 2.2L engine VIN: 1G2JB1241W
Thanks for your time. This one is wierd, replaced head gasket & now vehicle does not get hot. Idleing the hottest i've gotten it is 185 deg. F. & it has heat, as it is driven down the highway the temp. keeps droping & looses heat. The cooling fan came on at 18...
2000 Pontiac Bonneville SE 3.8L abs light & brake light VIN: 1G2HX54K4Y
This Pontiac intermitently turns on red brake light & anti lock at same time. While driving they will go on and off. Abs system has 10 different codes in it. Cleared and all came back . 1245,1248,1251,1263,1264,1265, 1267, 1268, & more. Codes point to solenoid...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Century Custom 3.3L heater VIN: 1G4HAH54N4
thanks for all the help replies i replaced the stat no 3 dont forget everyone new is not always good parts are not like they used to be a easy job turned out to be a headache thanks again
2000 Buick Park Avenue Ultra 3.8L Cuts out, VIN: 1G4CU5212Y
Problem is so intermittent that we have not been able to duplicate. Received 1 help request about yaw rate but it showed good & vehicle would not act up to see if any difference when problem occurs. Thank you for help, will repost if problem occurs often enoug... Trouble codes: U1040 (Loss of comm. ECM), U1088 (Loss of SIR comm IPC), C1281 (VSES sensors uncorrelated).
1990 Cadillac Seville 4.5L Misfire VIN: 1G6KS5334L
Don't you just love it when a part that you just replaced is defective. After numerous test drives, found one of the new injectors we just replaced with only 2.3 ohms. We replaced that injector and guess what. The miss was still there. Craig, Paul and Ray ment...
1988 Chevrolet Corvette 35th Anniversary Edition 5.7L MIL Lamp on, CODE 36 VIN: 1G1YY2185J
the relays did fix the problem, i replaced both of them and all was well. thank you Trouble codes: 36 (maf burn off).
1991 Chevrolet Camaro RS 5.0L No Start, Cuts out VIN: 1G1FP23E5M
You guys are the bomb! Thank you Chris [...]. You hit it right on the head. The whole problem was in the VATS system.Where we really got led astray was in GMs own pinpoint tests. Nothing about looking for the security light to... Trouble codes: 53 (vehicle anti theft system circuit).
1991 Chevrolet S10 4.3L Hydraulics VIN: 1GCCS14Z0M
Thank you for all your replies. 1.) Bad parts 2.) Too much slave throw via flywheel clearence 3.) Excessive engine thrust bearing 4.) Heat Had varified all, less flywheel, as did not believe this little difference would cause this hydraulic failure without...
1993 Chevrolet K1500 Cheyenne 5.7L cooling system VIN: 1GCEK19K4R
Thanks again guys. Your thoughts and advice sent me in the right direction once again. As suggested by Sherman, Paul, Dale, Gary, Ryan and Roger, the oil cooler was the cracked, leaking into the radiator. Dale's comment that accurate pressure testing by the ra...
1998 Chevrolet Blazer 4.3L turn singal flasher VIN: 1GNDT13W5W
thanks to all of you that replied! i reviewed the wiring diag. & seen just about everything went to the multi function switch so i took 1 wire at a time out of the connector. after removing 1 of the left side turn signal wires the flasher stoped clicking! ther...
1999 Chevrolet Tahoe LS 5.7L radio/lighting VIN: 1GNEK13R9X
The responses I received said to look for shorted speaker wires for the lack of output from the radio. We had a real bizzare one here. Three separate problems - 1)4 wires installed incorrectly in 16 way connector in left kick panel(colors not matched up), 2) w...
1999 Chevrolet K1500 Suburban 5.7L Misfire VIN: 3GNFK16R1X
Unfortunately the problem is not repaired. thanks to all who replied and tried to help us with this problem child. Anyway, We really had a lot of good responses but only 2 we had not already attempted. The first was a Delco Distributor. We removed the old one ...
1999 Chevrolet Silverado 1500 4.8L Misfire VIN: 2GCE19V9X1
Thanks for all the suggestions found the problem to be a bad oxygen sensor and oxygen sensor vehicle harness connector. What was happening was when the ing. key was turn on engine off the pass. side up stream 02 sensor was reading 1107mV while the rest of the ... Trouble codes: P0300 (random missfire).
2000 Chevrolet Impala 3.4L MIL Lamp on VIN: ZG1WF55E4Y
The prob. on po401 EGR code was stoped up passage in intake. In order to see prob. and clean it was nessary to remove T. body. With body off it was easy to see carbon, not so easy to clean. Maybe some out their have better tool of method, but what I did was ma... Trouble codes: P0401.
2002 Chevrolet Tahoe LS 4.8L alley lights VIN: 1GNEK13VX2
Thanks for the quick responses. H steve Lee gave me the code 3 web address, Jim [...] sent me web info for galls, a company that works with emergency equipment. After reading jim's explanation...
2002 Chevrolet Cavalier LS Sport 2.4L wss code VIN: 1G1JH52F32
1 reply was to blow ot connectors for abs Actual fix removed connectors C-313 near fuel tank and clean check connection C-200 by firewall inside of car Remove C-100 connector below the ar box to remove moisture. I also had to remove the plastic barrier on fema...
1999 GMC Jimmy SL 4.3L transfer case VIN: 1GKDT13W5X
Thanks for the help guys, especially Len who put alot of time into explaining the system. I did some more testing on inputs and outputs and found there was always 5 volts going out of the TCCM on both wires going to the encoder motor. Pulled these wires from t...
2003 GMC Yukon SLE 5.3L On Star VIN: 1GKEK13Z43
I am sorry to report the customer has not returned for repairs. He has been phoned and will bring it in for the problem next oil change. When that happens I'll let you know. Thanks to those who took the tme to respond and I will use the information when he com...
2000 Pontiac Grand Prix SE 3.1L ignition key VIN: 1G2WJ52J7Y
Almost all replys said the control to the ignition switch sol. is controled by the transmission shifter, but is repplaced as a whole unit. The Customer does not have the money for the shifter replacment for now. Thanks for all the replys
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