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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 27, 2009
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1998 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on
Hello Fellow Techs, This car is driving me crazy. Vacuum was 17 in., did Motorvac, raised to 20 in. Vehicle has code P0300 - Misfires. At idle and low speeds, cylinders 2 & 6 show misfies. Under load, cylinder 1 misfires, cylinders 2 & 6 do not. Swapped 1 & 3 ... Trouble codes: P0300 (Misfire)
2004 Buick LeSabre Custom 3.8L courtesy lamps VIN: 1G4HP54K04
cannot find all splice locations and connector locations without gutting interior. wiring diagram does not give locations. circuit affected is circuit 149 .5 DK BLU/WHT splits off from rear fuse block connector e12, d12 then into splices SP306, SP310. I cannot...
1989 Chevrolet V1500 Suburban Silverado 5.7L MIL Lamp on VIN: 1GNEV16K4K
Ok here it is in short ladies and gentlemen,I have a 1989 chevy suburban,I have owned this vehicle for 3 years bought it with a bad transmission from auction.the vehicle sat up in my yard for 3 years until a neighbor needed a vehicle to borrow.it has a gm crat... Trouble codes: 43 (esc problem), 44 (lean exhaust)
1991 Chevrolet K1500 Silverado 5.7L convertor clutch VIN: 2GCEK19K0M
Please need help here,put in used transmission because old one was burnt to a crisp, road tested afterward no tcc apply, raised up on hoist, found tan wire and hooked up jumper to it into the cab for test purposes, hooked up scanner and road tested again, this...
1995 Chevrolet Tahoe 5.7L Lighting VIN: 1GNEK13K25
3 things are going on with this truck first it dose not shut of when you remove the key you have to pres the brake it dose not have a remote stater but it dose have a trailer brake it dose not do it all the time #2 when you put the turn signals on the alternat...
1995 Chevrolet K3500 5.7L Speedometer VIN: 1GCHK34K4S
I have this truck and it has no vss. I have pwr and gnd to the buffer. I have a 60htz signal from the vss. It has 10 volts dc output to the cluster and abs. The 5 volt ref to the pcm is also there. It has no speedometer, or vss on a pcm data list. Also has no...
1996 Chevrolet Monte Carlo LS 3.1L No Start, Stall VIN: 2G1WW12M8T
driving down the road car stall and would not restart.scan ecm pull maf code p0101.check data ecm is seeing crank signal car starts then dies .clear codes then car stays running. Trouble codes: P0101 (maf)
1996 Chevrolet K1500 Silverado 5.7L axle actuator
road tested this vehicle for an un-related problem. during road test decided to engage the 4w4. everything ok until command given to dis-engage. vehicle stayed in 4wd. checked power on both blue wires both at 4wd switch and 4wd actuator on front diff. ( consta...
1999 Chevrolet Silverado 1500 4.3L No Start, Poor Idle Quality, Cuts out, Stall VIN: 1GCEC14WOX
HEY EVERYBODY! We have this 4.3 silverado that wont start for the most part. we have 60-65 lbs fuel press. and 18 oz. volume. the truck crank and tryies to fire and sometimes does run a littlesounding like 2 cyls.are hitting. the injectors have a pulse when ch...
1999 Chevrolet Venture 3.4L door locks VIN: 1GWDX45875
Hello you all, I am stumped, this vehicle will not unlcok power door locks when put into park, it will lock all doors when put into gear, I have reprogrammed bcm 5 to 6 times. I have checked all powers and grounds going to BCM. wondering what triggers the modu...
2001 Chevrolet Monte Carlo LS 3.4L abs light, traction control VIN: 2G1WX12K2Y
Greetings fellow IATN techs. I have this chevrolet Monte carlo here(the vin number is from a different one, one of my own). The problem with them is similar. The 2001 LS abs supposedly activates everytime they back up or pull forward in a day. I have got the v...
2003 Chevrolet Malibu 3.1L brake pads VIN: 1G1ND52J93
i replaced the brakes 3 times in the last 40,000 miles anyone ever seen this on malibu
2005 Chevrolet Tahoe LS 5.3L ipc lamps VIN: 1GNEC13Z25
vehicle originally brought in for dash lights in-op. found tbc 2c fuse blown. replaced fuse and sent vehicle on its way. vehicle came back 5 days later with fuse blown again(officer stated he was sitting at idle and ipc lamps just went out,also made comment th...
2006 Chevrolet Impala LT 3.9L steering VIN: 2G1WC58146
customer is complaining of hard turning to the left after anouther shop install inner tie rods, not sure how this could affect the rack?? flashed system with tech 11 no change looking for anyone who may have had the same issue.
2002 GMC Envoy XL SLT 4.2L air suspension VIN: 1GKDT13S22
thank's in advance for reading my request for help, 2002 gmc envoy with rear air suspension while sitting overnight or after leaving vehicle parked for few hours, vehicle will drop down and takes too long to rise up or will not rise up at all and vehicle rides...
2004 GMC Envoy XL SLE 4.2L Stall, MIL Lamp on VIN: 1GKES16S94
We have this Envoy here that keeps setting this P0016 code always sets when cold but is intermittent. The customer is also complaining about the engine shakes and feels as though it may stall at times when coming to a stop.We did find that the camshaft actuato... Trouble codes: P0016 (Camshaft and Crankshaft Position Correlation Problem)
1998 Oldsmobile Intrigue 3.8L Rear Calipers VIN: 1G3WX52K3W
Hi all, This is a car that my son worked on. The rear brakes needed replaced and now we can't get the rear brakes to bleed (No fluid comes out when vacuum bleeding or pumping or gravity bleeding). The antilock light is on with the code C1246. Wanted to check ....
1998 Pontiac Bonneville SE 3.8L Hesitation, Surge VIN: 1G2HX52K7W
So i test drove the car and could feel right away this hiccup or glitchy feeling it exhibits. kind of like a lean miss or some backfire/too much egr feeling. Usually does it while cruising and then you accelerate, but it will act up while leaving a parking lot... Trouble codes: P0171, P0230, P0404, P1404
2002 Saturn SC1 1.9L Hesitation, Cuts out, Stall VIN: 1G8ZP12862
vehicle came in with above codes and egr valve connector disconnected. codes cleared. egr commanded % not matching actual egr %. egr replace with new a/c delco egr valve. vehicle test driven. idles perfect. under accel will kick and buck like a horse no matter... Trouble codes: P0403 (egr solenoid control circuit), P0405 (egr position sensor circuit loww volt), P0410 (air injection reactor management), P1620 (low coolant)
2003 Saturn L300 3.0L vacum VIN: 1G8JW84R73
when giving it the gas the car makes a whiseling noise. and slight loss of power that sounds like the intake. or breater box. thanks for the help.

Fixes & Summaries for GM
Fix/Summary Answers
2005 Cadillac CTS 3.6L heater VIN: 1G6DP56765
removed heater core and cut it open and found it partially clogged not sure with what. car only had 35000 miles on it so someone added something to this one. thanks for your replies
1996 Chevrolet Lumina 3.1L no upshift VIN: 2G1WL52M7T
Well I want to thank everyone for there help it looks like its time for a jasper trans.Thanks again everyone!
1998 Chevrolet K1500 Silverado 5.7L won't read empty VIN: 1GBEK19R3W
Well, this was one for the books. At least the chapter on why to avoid CHEAP pumps!!! We were getting nowhere with testing, and we decided to pull the tank and check resistance right at the sender. It had come unsnapped from the module and was just drifting ar...
1999 Chevrolet Malibu 3.1L No Brakes VIN: 1G1ND52M1X
Found two ABS sensors on a junk 98 Cutlass. That fixed it. The 97 to 2000 Malibu's and Cutlass' have interchangeable parts if someone needs some used parts for one of these vehicles in this time frame. I really appreciate all the help everyone gave. Who kn...
2003 Chevrolet Avalanche 1500 5.3L transfer case VIN: 3GNEK13T43
Thank you everyone for the help.The problem was the clutch in the transfer case was toast.The customer is deciding what he wants to do with it.My rcomendation was a reman transfer case.Once again IATN members help the day go better.
2007 Chevrolet Monte Carlo LT 3.5L MIL Lamp on, Reduced power. VIN: 2G1WK15N97
Apparently the PCM was incorrectly interpreting the signals from the TPS. A new PCM corrected the problem. The old PCM had minor cosmetic damage from the collision, but internally it looked fined. Thanks for the replies. Trouble codes: P2135 (TPS Sensor 1-2 correlation problem.), U0140 (Lost communication with BCM.).
2008 Chevrolet Tahoe LTZ 5.3L Stability Control VIN: 1GNFK13048
Hi everybody, thank you for all the responses i received, i try another electronic brake control module from another car i still got the same codes, check all the CAN wires all seems ok, i beleive is something to do with engine control module but as there is n...
2003 GMC Yukon Denali 6.0L Hesitation, loosespower VIN: 1GKEK634X3
truck is fixed waited to see if prob would come back & it did not. he fix was the left front sensor (wheel bearing assembly.What had me confused was that never once did it go into abs mode on slow stops this is the norm here to go into abs on slow stops, never...
1977 Pontiac Bonneville Brougham 4.9L water pump VIN: 2Q69Y7P397
Thank you for all of your help. The baffle plate was on the old water pump and the customer still had it from when he replaced the pump. We installed the plate and no more overheating. Thanks again to all of you who responded.
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