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Prev Professional Automotive Repair Technical Discussions for January 20, 2010
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Open Help Requests for GM
Help Request Answers
2002 Buick LeSabre Custom 3.8L Mechanical VIN: 1G4HR54K32
OK we have a code p1811 .Test drive was normal shifts were good tcc applied had about 35 rpms slip.shift time was .15-.18 and .The local trans shop told them they needed a $400.00 repair to replace something, she thinks a solenoid,I would imagine epc.From what...
1994 Chevrolet C3500 Cheyenne 6.5L lack of power VIN: 1GCHC33XR3
Just a quik question, when changing fuel filter I found aluminum shavings in filter housing on the outside of fuel filter.Can anyone tell me if this is coming from injection pump? How does the fuel flow, tank to filter to injector pump to filtero tank?
1997 Chevrolet S10 LS 4.3L spark plugs VIN: 1GCDT19XXV
i have a 97 s10 4.3l automatic we were wondering if any one knew what heat range spark plug i should use, or if anyone has a ac delco part#. the truck has a powerdyne supercharger with a 6lbs pully. the motor has been changed 50,000 miles ago along with the tr...
1997 Chevrolet K1500 5.7L No Start VIN: 1GCEK14R8V
Here is a first for me in my 30+ years in this business. This truck came in with a fuel leak at the fuel line to injector assy connector."spider assy under intake". It was driven here. When we tried to start it, there was no spark, no fuel pump activation, no ...
1997 Chevrolet Monte Carlo LS 3.1L balancer VIN: 2G1WW12M1V
however once the repair was completed and the vehicle was started we got an arcing from the balancer to the block and between the two halves of the balancer. It was a very blue arc that was not as evident with the drive belt disconnected. I looked at the 24x c...
1999 Chevrolet K2500 5.7L No Start VIN: 1GBGC24R5X
ok the truck came in about 2 months ago customer drove it in,said every time it is real humid or rains the truck will not start. we had truck for a good week and nothing ran fine every day. gave truck back and bam the next day it would not truck back...
2004 Chevrolet Tahoe LT 5.3L no spark VIN: 1GNEK13Z04
Hello, this tahoe came in on the hook, 1st time seeing vehicle. customer states after driving for 1/2 hour, turn off, restart 5 min. later and drive that vehicle shuts down. arrived to us 30min. later and still no-start. scanned and has P0101 mass air flow ckt...
2004 Chevrolet Tahoe LT 5.3L temperature VIN: 1GNEK13Z84
first check out revealed low coolant and dripping from lower hose from recent water pump replacement. fixed leak and filled it up, test drove, still overheats (runs about 235 degrees). found a few articles on identifix about using the coolant tube at throttle ...
2004 Chevrolet Malibu LS 3.5L MIL Lamp on VIN: 1G1ND52F64
i have this 2004 malibu from a used car dealer that periodically illuminates the service engine soon light. ive had this car in a couple of times and every time there are no codes present. when you start the car, the service engine soon light will come on aft...
2004 Chevrolet Silverado 2500 HD 6.6L ABS and Brake light on
I am working on a 2004 Chevrolet 2500HD Duramax 4x4. The problem I am looking at is the ABS and Brake light is coming on and also the Service Brake Message on the IPC. There are no stored Dtc's in the EBCM. When the lights come on and using a Tech 2 it will sh...
2006 Chevrolet Cobalt LT 2.2L instrument illumination VIN: 1G1AL55F66
It's no wonder my hair is turning grey!! These cars alone can cause it!! Not to mention some 50+ years under the belt!! The instrument panel lights, drl, remote key fob, and who knows what else are inop. (Primary concern is the panel lights). Ipc tests good. T...
1992 Geo Metro LSi 1.0L head gasket VIN: JG1MR3364N
Hello GEO experts. This car uses coolant. About 2 quarts every 20-40 miles miles. It started all of a sudden driving on the interstate when the temp gauge suddenly shot up and I found the radiator was empty. It was full when I left that day. Since then after d...
1999 GMC Sonoma SLE 4.3L Starting VIN: 1GTCS19X8X
Heres what we have going on here, Vehicle was towed in for a crank with no start condition. This has happened before. The vehicle will have a no start problem after a steady rain. Every other time the customer was able to let it sit for a few hours and it woul...
2001 Oldsmobile Alero GL 3.4L Misfire VIN: 1G3NL52E41
This vehicle came in with a misfire under load between 70 and 80 km/h. Scan data shows that all the cylinders misfire when it occurs. Fuel pressure and fuel filter are ok. Cleaned the mass air flow sensor. Blocked the EGR. Changed the plugs and wires. Did a cr...
2001 Oldsmobile Aurora 3.5L Starting VIN: 1G3GR64H31
I have a fun one here. If you turn the key to crank, the PCM does not activate the starter relay. If you pause the key in the on position before going to start it starts immediately. The voltages coming from the ignition switch are good. when it starts the PCM...
2002 Oldsmobile Alero GL 2.2L Heater Core VIN: 1G3NK52F42
I have this car in with a 2.2 ecotec motor and i am getting no heat ever. The car warms up to opperating temp at idle and while driving but does not produce heat in the car. i have taken both hoses off of the heater core and found that there is no flow at all ...
2009 Pontiac Vibe AWD 2.4L abs light VIN: 5Y2SM67079
So I have this vehicle with a list of codes u0073 control module communication bus off u0123 lost communication with yaw rate sensor module u0124 lost communication with lat. acc. sensor module u0126 lost communication with steering angle sensor module. We use...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac Catera 3.0L Oil leak VIN: W06VR52R8V
Sorry for the delay in posting a fix, finally got cust. back in for repairs this week. Pulled intake manifold and coolant crossover, lots of oil in engine valley, replaced 4 sealing washers at cooler line to cooler connections, replaced o-ring seals from cool...
1997 Chevrolet Astro 4.3L Poor Idle Quality, MIL Lamp on VIN: 1GCDM19W1V
Good morning everyone,sorry I took so long replying back but I fixed this van with all your help.After checking EGR valve for carbon and blockage and found none,verifing fuel pressure,checking leak down on injectors,and firing order,I started checking for defe... Trouble codes: 300 (random misfire).
2000 Chevrolet Cavalier Z24 2.4L starter VIN: 3G1JF12T3Y
Thanks for all the replies. As a few of you said, there was a recall on these cars to add a relay to the starter system. The reason we didn't have the purple wire to the starter was because when the recall was done that is changed so it goes up to the relay in...
2001 Chevrolet Silverado 1500 LT 4.3L Misfire, MIL Lamp on VIN: 1GCEC14W91
Thanks for all the replies. The problem was found when I removed the upper intake I found that cyl 4 and cyl 6 of the injector module was leaking which was causing low fuel volume to those cyl. Replaced the fuel module and it was fixed.. Trouble codes: P0300 (Muti cyl misfire).
2007 Chevrolet Corvette 6.0L anti theft VIN: 1G1YY36U67
Once I found the right information for diagnosing this problem it was pretty easy to figure out. Alldata and Mitchell had little info on it. On I was directed to GM Doc # 1886513 which I found on the GM techline. It has the procedures ...
1999 GMC Jimmy SLE 4.3L 4x4 VIN: 1GKDT13WZX
I'm sorry I didn't get back sooner, but i have fixed jimmy. I ended up replacing the transfer case module. I want to thank Sean [...]. and others who responded. thanks alot to iatn.
2002 GMC Sierra 2500 HD 6.6L Hesitation, Misfire, MIL Lamp on VIN: 1GTHK23192
Well the last time this truck acted up, we checked the wiring harness around the ficm, also check the large connectors above the driver valve cover. Never found a problem. Customer had been driving truck for the past 2-3 weeks and hasn't missed a lick, however... Trouble codes: P0101, P0201, P0204, P0206, P0207, P1261.
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