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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 3, 2005
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Escalade 5.7L Steering VIN: 1GYEK13R9Y
Hello comrades! We've got one driving us crazy and would appreciate all/any input you might have. This Escalade came in with a very sloppy gear box and no other complaints. We replaced the gear box with a REM unit. Within two days customer complained of diffic...
1989 Chevrolet Celebrity 2.5L Stall VIN: 1G1AW51R4K
This vehicle will stall at idle or decel, hot or cold. It could happen once or multiple times.Vehicle will restart immediatly. O2 is swiching. Minimum airflow was checked. Min TPS voltage is .48v. In gear IAC motor is at 30. Oil pressure is 30lbs. We bypassed ...
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 Blazer 4.3L sift sol.A, shift sol. B,etc. VIN: 1GNDT13W0V
Chevy transmission guys, We have a blazer that was intermittently throwing check engine codes P0753 (solenoidA), P0758 (solenoid B), P0785(shift timing solenoid), P0740 (TCC circuit malfunction). Customer had complained of check engine codes before reverse fa...
1999 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52JXX
Hi Guy and Gilrs I have this car that has me stump with no spark. The car belongs to a dealer and had it to another shop for no start. It was bought as a no start from the auction. the guys did all they could and now they passed it to me . they have tried a go...
2000 Chevrolet K3500 7.4L MIL Lamp on VIN: 1GCHK34J6Y
This truck came in with a p0172 and p0175 and also a hard start on a hot soak of about 10 to 20 min. fuel pressure was dropping of slowly. Checked injectors and found four dripping. Replaced all 8 inj with new bosch inj from linder tech also replaced rhe fuel ... Trouble codes: P0172 (Fuel trim system rich bank 1), P0175 (Fuel trim system rich bank 2)
2000 Chevrolet Impala 3.8L No Start VIN: 2G1WF55K3Y
Greetings techs. This Impala refuses to cooperate. Approximately 3 - 4 times per week, engine will exhibit extended crank time. Of course, I've never been hooked up with any test equipment when it happens. After the engine starts, it idles and runs just fine w...
2001 Chevrolet Silverado 3500 LS 8.1L Fuel Gauge VIN: 3GBKC34G41
This is a strange one, also spent 1.5 hrs with standard tech line...no help. This HD 2500 vin G has 2 gas tanks and one main fuel pump in the front tank, a fuel level pump on the rear frame rail to transfer fuel from the rear tank to the front tank. the rear t...
2002 Chevrolet Silverado 1500 4.3L distributor cap and rotor VIN: 1GCEC19W02
This vehicle has random missfire codes from electrolisis oxidation in the distributor cap. it needs a new cap every 2 months. As soon as you change the parts the miss is gone. I found no tech, serv, bullitans onthis matter. I thought of putting some zink near ...
1996 Geo Tracker 1.6L MIL Lamp on VIN: 2CHFK5GLRT
at 60k miles, the "service engine soon" lite came on.did this come on because of a trouble code issue or because it reached exactly 60,000 miles.if the latter is the case then how do you reset it or turn it off. If it is a trouble code then how can you extract...
1995 GMC Jimmy SL 4.3L 4 wheel drive VIN: 1GKDT13W6S
Vehicle will not engage in 4WD High, 2WD works fine and 4WD Low works fine. When vehicle is shifted to the 4WD High position the 4WD indicator lights will flash and sometimes all the indicator lights will come on at once. Occasionally you can get the vehicle i...
1995 Oldsmobile Achieva S 2.3L Poor Idle Quality VIN: 1G3NL55D6S
Customer complains of extended cranking upon start up and rough idle when cold. Take's about 3-5 seconds of cranking to start up. When vehicle has misfire. o2 voltage slowly rises above 600mv. Block learn will drop to 40 then go back up to 128. when block lear...
1998 Pontiac Trans Sport Montana 3.4L air bag VIN: 1GMDX03E5W
This van trips a 1040 AIR BAG code as soon as the key is turned on. My scanner does not recognize the code and I am without the manual i need to do a flow chart for this code. Can someone fill me in on what this code is for and i will tackle ot from there and ...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Park Avenue 3.8L heater VIN: 1G4CW53L1N
Hello all, Happy New Year. Thank you to all that helped out with this problem I had. I tried a oem thermostat and gasket as suggested but no difference in heat. Then I tried a waterpump and noticed as I was dismantling it that the pulley was or had been rubbin...
2000 Buick Century Limited 3.1L MIL Lamp on VIN: 2G4WY55J7Y
Yikes! I posted the FIX in the UPDATE column! I'm so sorry - we have received quite a few more replys including info. from Bob the Buick tech who swears that the CEL will not come on for a P1189, but the wiring harness does chafe against the ac accumulator whi... Trouble codes: P1189.
1999 Cadillac Escalade 5.7L ride control VIN: 1G4EK13RXX
thanks to all who responded. I found out buy reading all the help emails that the steering column position sensor is a repeated failer for this vehicle. After testing the sensor it turned out to be failty.Thanks for every thing and i hope that every body had a...
1999 Cadillac Seville STS 4.6L Cuts out, Stall VIN: 1G6KY549XX
As Paul from LA pointed out, the positive battery connections can be a problem. Even though we had checked this before, further disassembly and inspection of the cable connections revealed an intermittent poor connection. The car has been good for about 2 week...
1989 Chevrolet Blazer Silverado 5.7L Excessive Emissions VIN: 1GNEV18K0K
finally!!!. i installe a new ecm on this veh,,finally got some infor out of it, started to run much better, ONCE I WAS ABLE TO RECEIVE some data, out of this beast,,,we where able to see what was going on..I ALSO FOUND BAD GROUND BY T/STAT HOUSING, POSS SHORTI...
1989 Chevrolet R1500 Suburban Scottsdale 5.7L Cuts out VIN: 1GNER16K6K
This vehicle never returned to the shop, however, I do have some comments and observations. First, all 18 of the replies received were well thought out and right on the money. As was pointed out, I failed to provide adequate info ( spark and injector pulse for... Trouble codes: 32 (EGR malfunction).
1996 Chevrolet Blazer 4.3L No Reverse VIN: 1GNDT13W7T
Thank all of you that responded The fix was replacing the trans, After tear down to see that you all were right, the sun shield was broken.. The 4x4 problem was easy, a vac line burned on the exhaust pipe, Found that when pulling the trans. Thanks again for ...
1997 Chevrolet S10 4.3L Hesitation, Stall VIN: 1GTCS14X2V
After more checks were made on the fuel system, we decided to try another new fuel pump. the pressure came up to spec and we havnt seen the truck in 2 weeks. I would like to thank everyone for all the help. This is a great tool for our shop. Thanks again. Trouble codes: P0131, P0151.
1999 Chevrolet Silverado 1500 5.3L Misfire
As some have suggested, the cat was plugged. Checking backpressure on bank 1, I found 6psi backpressure-definitely no good. After cat replacement-truck runs perfect. No misses and revs out w/good power. Looking at firing order --1843 6572--you can see that... Trouble codes: P3000.
2002 Chevrolet Silverado 2500 HD 6.6L codes VIN: 1GCHK29122
2003 Chevrolet Tahoe LS 4.8L dash VIN: 1GNEK13V53
Thank you to the three people who took the time to respond to my help request. Joseph from Pa. suggested to use plastic instead of real wood due to ease of installation. Steve from British Columbia suggested trying Beverly hills Motoring Acc. but I could not f...
1996 GMC Topkick 366CID actuator VIN: 1GDJ7H1P4T
I got 3 replies,Jeffrey [...] seemed to have the most knowledge of this system.He said he services a fleet of these and there is no cure they just change the fluid regularly during the cold months. A couple of people didn't seem to completely understand the s...
1991 Oldsmobile Delta 88 Royale Brougham 3.8L Transmission VIN: 1G3HY54C3M
Thanks for your help. It turns out to be a bad connection on the positive battery cable. The positive cable has a plastic cover that was in perfect condition but was very corroded underneath. Check the basics. One of my techs changed the plugs and wires. After...
2001 Oldsmobile Intrigue GL 3.5L Engine Noise VIN: 1GW3WH52H5
Hello All, As you might expect, its a very busy time of year. I have had little time to work with this vehicle. However,I do have some information to pass along. Kevin from Pennsylvania suggested that I check the control valves by appling vacuum during KOER- i...
1993 Pontiac Sunbird LE Value Leader 2.0L door locks VIN: 3G2JC51H9P
Thanks to Lee, David and Duane fot their helpful responses. First of all I must apologize for not stating that the doors will lock from both front doors. The door control relay is located tucked away behind a harness, behind the right side of the glove box. Vo...
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