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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 11, 2005
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1992 Buick Park Avenue 3.8L PassKey VIN: 1G4CW53L2N
The client wishes to bypass the system due to cost of parts. Is there any way to do this? Does the PCM control the primary ignition as well as the injectors and starter or is the circuit opened by the pass key module?
1996 Buick Skylark Custom 3.1L Security VIN: 1G4NJ52MXT
Intermitently the passkey system does not recognize the key upon engine cranking and the vechicle starts and dies. We found the airbag module sitting in water under the passenger seat. Removed the module and the vechile worked fine for a week. This is a "wonde...
1997 Buick Park Avenue 3.8L engine/vibration VIN: 1G4CV5211V
hello to all I have this buick in that had a water leak from the water pump. Replace the water pump on this and noticed a pretty good engine vibration in the body after the repair found the trans mount by the radiator was bottomed out and torn so replaced that...
1988 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions, Cuts out, Stall, Poor Fuel Economy VIN: 1GCDC14K3J
hi guys. trying to help a friend out at another shop w/ a problem child. this truck came in w/ a spun bearing. he put a crank kit in it and found out that it was actually a 305 engine. this shouldn't have been a big deal, but when he fired it up, it almost imm...
1995 Chevrolet Lumina APV 3.1L engine VIN: 1GNDU06D4S
Hi all, This is the old fashioned 3.1 with distributor. When customer booked in the vehicle, I just figured the intake was leaking as there was very cloudy oil and much coolant foam in the valve cover. Well, this engine has the old fashioned paper intake gaske...
1999 Chevrolet C1500 Suburban 5.7L Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 3GNEC16R7X
Thanks techs in advance!! This truck has been a nightmare, first of all the vehicle came in with the customer concerned that the transmission was going out. Fluid smells good and transmission shifts perfectly on time. After the vehicle is at operating temp,tak...
1999 Chevrolet Tahoe LS 5.7L steering wheel VIN: 1GNEK13R6X
this vehicle has a steering wheel vibration between 40 and 55 mph most noticed at 50mph on straight flat roads. we have sampled 2 different sets of wheels and 4 different sets of tires. all front end parts are tight and dont see any visual problems. replaced u...
1994 Geo Tracker 1.6L Timing Belt VIN: 2CNBJ18U7R
Have a problem with the timing belt ridding outward and rubbing holes in the timing cover. Customer came in with original problem of belt noise due to timing belt ridding outward into cover. Replaced timing belt, timing belt tensioner and timing belt cover. ca...
1990 Oldsmobile 98 Regency Brougham 3.8L No Start VIN: 1G3CW54C3L
Car came in for HARD Start No Start Cold. If it gets below freezing you have to plug car in for an hour or so and it will start. But Starts hard. Bucks a little then fires and runs GREAT for the day. Gets cold, Same thing. Replaced Plugs and will try again in ...
1995 Pontiac Firebird 3.4L tachometer VIN: 2G2FS22S8S
One of my students changed his Tachometer and it now reads less RPM than actual. Is a V-8 tachometer, which he installed, compatible with his V-6 application? Can we reflash the PCM? Thanks in advance Arne
1996 Pontiac Grand Am GT 3.1L MIL Lamp on VIN: 1G2NW52M4T
can clear this code,after a few days,30 miles,it will reoccur,don't have a smoke machine,i did test purge and canister solenoids with scan tool,they both pass,also removed the purge solenoid and applied battery voltage with vacuum applied,it will hold and rele... Trouble codes: P0440

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac Eldorado 4.6L head gasket VIN: 1G6EL12Y2V
well some replies suggested that the block was junk how ever knowing that this must be a common problem or there wouldn't be a Tsb. for this and these engines are rebuilt I will forget about that. A couple points 1 do not call any dealer other than a cadillac ...
1997 Chevrolet Tahoe LS 5.7L No Start, Hard crank VIN: 1GNEK13RXV
Well, thanks to IATN, another one goes down the road repaired. Eric from Ontario hit it on the head(crank sensor) but all the responses were good possibilities. This cust works on his own stuff until something like this comes along. He had replaced cap, rotor,...
1997 Chevrolet Venture 3.4L Cuts out VIN: 1GNDU06E1V
Hello techs, I have checked and double checked the basics, exhaust for blockage,fuel preesure/volumn,plugs & wires,coil packs,CPK signal.I think Ray & Greg have this pegged. ECM Rev. limiting. I changed PRNDL switch with OEM.No change.Then checked range parame...
1999 Chevrolet Tracker 2.0L 4x4 light VIN: 2CNBJ13C9X
tested actuator inside front differential with vacuum tester. Actuator engages but looses vacuum slowly. this cuases the pump to run and light to come on and when the light comes on the pump runs to engage the differential ove an over.
2000 Chevrolet Blazer LS 4.3L Blower Motor VIN: 1GNDT13W5Y
This one is in the can. Thanks to all that offered help. 14 replies in all. I think a couple of those were double info from the same friend. It turned out it was the blower motor controller. Thanks to Allen [...] for faxing me a wiring diagram and flow chart. Th...
1990 GMC C3500 Sierra 7.4L alternator VIN: 1GDJC34N1L
Hello Techs thanks to everybody for there help .I installed a Wilson heavy duty alternator with large case bearings. The second step I took for the belt tension being to tight was drilling a extra pilot hole for the tensioner assembly slightly more clockwise s...
1991 Oldsmobile 98 Regency Elite 3.8L starts in 3rd, VIN: 1G3CW53L3M
thank you for all your replies, I had checked all the fuses but then I found a small fuse box under the glove box and there it was. I replaced the fuse and off I went , this is an awsome service. thanks iatn
1992 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5473N
This car runs 95% better than it did before I replaced the bad CTS. However code 45 had returned at least twice on the same day immediatly after replacing the CTS. The next morning I drove the car again and the code 45 did not return. The helpful replies that ... Trouble codes: 45 (O2 Rich).
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