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Prev Professional Automotive Repair Technical Discussions for February 26, 2009
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet C3500 6.5L engine VIN: 1GBKC54F6R
this truck runs at times,when it cranks it will run for about ten minutes and than just shut off like you turned the key off,replaced glow plug module due to code 29 glow plug module circiut but that was not the problem any help would be appreciated.
1995 Chevrolet S10 LS 4.3L Heater VIN: 1GCDT19Z8S
Thanks for reading this I hope someone has the answer. I live in a cold wintery climate & a defroster is a must. The problem is intermittantly the air flow out of the heater ducts is low & sometimes there is a hot smell associated with it.The heater mode cont...
1996 Chevrolet C2500 Cheyenne 6.5L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 2GCFC29S4T
Hey guys looking for some help on something i never work on (diesel engine trucks.This is a friends truck he bought roughly a year ago.When he bought the truck it needed an injection pump.The place he bought it from supplied him with a used one (theres the fir... Trouble codes: P1216, P1217, P1214
1997 Chevrolet S10 LS 4.3L No Start VIN: 1GCCS19X3V
this truck is a repoe for a car dealer i do work for. thought fuel pump i can hear it running and it has fuel at rail. has spark, checked plugs they were extremely fouled so i replaced them. has good compression. it did have a couple of tp low voltage codes fo...
2002 Chevrolet Avalanche 1500 5.3L 4wd drivetrain, diff, axles, transfercase VIN: 3GNEK13T22
Ive hit a wall here and need some help. This vehicle has a common sounding bearing "Whine" comming from the front left when in 4wd only. The noise is speed sensative, louder when faster but is always present. It does not appear to be rpm sensative. I have road...
2003 Chevrolet Trailblazer North Face 4.2L no communication VIN: 1GNET16S03
hello... having a tough time with this one. codes U1000, U1041, U1152. airbag lamp is on & no communication to /from airbag module. also, no lights for 4x4 and will not shift into 4hi or 4lo, also no comm. at shift module and finally no data and no communi...
2003 Chevrolet Avalanche 1500 5.3L fuel gauge VIN: 3GNEC13T93
truck came in w/fuel gauge reading 3/4 al the time ,all other gauges are ok.we drop the tank to check the fuel sending unit .when we disconect the fuel pump plug and reconected again ,turn the key on and moving the sending unit it register perfect every time ,...
2000 GMC K2500 Sierra SLT 6.5L Cranking on its own VIN: 1GTGK24F3Y
Customer bought this truck about 6 months ago, brought it in to us to check for safety, and a general check over. Both batteries were dead, so we replaced them. Customer brought truck back a couple weeks later with both batteries dead again. Checked charging s...
1996 Oldsmobile Cutlass Ciera 3.1L No Start VIN: 1G3AJ55M7T
This car was towed in 1 week ago for a no start. When it got here it started right up. Has started since that time till yesterday morning. Car does sit outside. Both times the no start accured after sitting for at least 8 hours. Yesterday it did not start at f...
1997 Oldsmobile Aurora 4.0L Extended crank time VIN: 1G3GR62CXV
Hello GM techs, here's my problem. After warmup and engine off around 15 - 20 minutes, we experience an extended crank time to start. The most I have experienced is about 10 seconds; enough for the customer to say "...didn't used to do that." The only clue to ...
2001 Oldsmobile Alero GL 3.4L lifters VIN: 1V2C3G456G
hey guys, ignore the vin. i dont have in on me. im putting new lifters in the alero tomorrow and i havent replaced hydraulic roller lifters before. i tried to find info on presoaking and adjusting preload but im more interested in what you guys think rather ...
1997 Pontiac Grand Am SE 3.1L door locks VIN: 1G12GF578F
i have this grand am that at times not always while driving down the road the door locks will lock and unlock by them self's and then just stop.the interior light may also light with the door locks cycling.has any one had this problem ??
2005 Pontiac Grand Prix GT 3.8L Pan Gasket VIN: 2G2WS52225
See Related repair history.
2005 Pontiac Vibe 1.8L Hesitation, MIL Lamp on VIN: 5Y2SL63845
Vehicle arrived with engine service lamp on and would not accelerate over 18-19 mph with 2100 rpm maximum. Shut key off, wait a while and vehicle will restart and run for a while and then the lamp will come back on and again will not accelerate. Installed scan... Trouble codes: P2103 (Throttle Actuator Control Motor Circuit High)

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K9V
1984 Chevrolet Corvette 5.7L Mechanical VIN: 23456RTYUI
Thankyou all for guiding through this. It came out good, ran smooth, no noise or clunks between gears. I did replace the 1-2 gear slider as it was mushed on the teeth. I learnt alot from you Tranny men, and thanks again.
1986 Chevrolet Camaro Sport 2.8L Poor Idle Quality, Surge, MIL Lamp on VIN: 1G1FP87SXG
A lot of the responses pointed to a failing ignition pickup. We had initially assumed that it was okay since the car fan fine with the EST bypass disconnected. We connected up our scope, and at that point the car started running fine. (The pattern appeared ...
1995 Chevrolet C3500 6.5L No Start
Thanks For the information! After checking some basics I found the wire burnt off under the F/P relay, I repaired that and the pump sounds bad (pump on order) However it is working but has a high amp draw. After unplugging the temp sensor I was finally able to...
1997 Chevrolet Astro 4.3L crankshaft VIN: IGNEL19W9V
Well, I am going to call this van fixed. I put a good quality reman engine in. I think the failure was caused by contamination in the cooler lines. We replaced the radiator and flushed the lines extensively, but I think a flush is simply not enough. So this ti...
1999 Chevrolet K1500 Suburban 5.7L Poor Idle Quality, Hesitation, Surge, Cuts out, MIL Lamp on VIN: 1GKFK16R1X
After chasing my tail for over a week this one is finally out the door. Turned out to be a combination of things including the distributor!!! Looks like the key to this one is the misfire counter not working when it was obviously missing. After all the othe... Trouble codes: P0171, P0340.
2000 Chevrolet Suburban 1500 LT 5.3L Cooling Systems VIN: 3GNFK16T3Y
John from New York hit the nail on the head. The TSB he mentioned led me to find the problem. The heads are cracked for sure. Interesting though, the TSB didn't come up for the year 2000 5.3L engines. I looked at the 2006 TSB's and found the correct one. The D...
2001 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J31
First of all, thank-you to all who replied with recommendations and possible fixes. We actually received two posts that led us to the fix. We had installed the 7x crankshaft sensor that the customer supplied to us, we normally do not install customer supplied ... Trouble codes: P0107, P0230.
2002 Chevrolet Silverado 2500 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCHK29U82
Thanks to all who took the time to help out on this one!!! We replaced the intake manifold assembly which helped out some. The gaskets and plenum surfaces looked bad. The misfires at idle were now only cylinders #1 and #3. The compression on these cylinders ch... Trouble codes: P0300 (Random Misfire), P0106 (Map Sensor Low).
2003 Chevrolet Venture LS 3.4L Poor Idle Quality, Stall VIN: 1GNDVO3EX3
I rechecked all the sensors, all appeared good. Just the idle problem. I watched the misfire monitor and it appeared that 2 cylinders were missing. #1 and #4. I felt that the lifters were pumped up and not bleeding done, thus leaving the valves open some. This...
2004 Chevrolet Suburban 1500 LS 5.3L low range VIN: 3GNFK1GZ54
I would like to thank everyone that helped out. I was testing the evap system on this truck and ran the battery clear dead. After recharging and starting over I test drove again and the four wheel worked perfect! I had cleared the codes out with the scan to...
2007 Chevrolet Impala LT 3.5L MIL Lamp on VIN: 2G1WT58N77
Well This one is fixed. This car is owned by one of my accounts it was passed down to another employeee. Turns out this car has a remote starter installed by the dealership. The new owner of the car had his employee come here to fill up with gas. The employees... Trouble codes: P0411.
1998 Oldsmobile Intrigue 3.8L Hesitation, limp mode VIN: 1G35W52K0W
Thanks for the help guys...AC Delco tech support line led me to the answer. My Mitchell wire diagram tells me that the grey wire is the sense wire and doesn't say what the orange wire is...The orange wire is the sense wire and with the car running and alt cha... Trouble codes: P0560.
2004 Oldsmobile Alero GL 2.2L valvetrain VIN: 1G3NL52F44
Thanks to Rob from Michigan, and Christopher from Ohio for the useful information. The oil pressure was right in spec. at 1000 rpm. After talking with the customer about potential damage to the engine, there is already alot of metal in the oil, we decided t...
2005 Pontiac Aztek 3.4L temp gauge VIN: 3G7DA03E55
first let me say thanks for all the help i recieved from you all and i fixed this vehicle with a replacement coolant temp sensor from the dealership,the sensor had been replaced but with an aftermarket sensor and this was causing the vehicle to run hotter than...
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