1995 GMC Jimmy - Page 8 - Answered Questions & Fixed issues

It is not receiving fuel you need to check your fuel pump.

P1441 CHEVROLET Description The Engine Control Module (ECM) has detected vacuum flow to the Fuel Tank Pressure (FTP) sensor during a system sealed condition. Possible causes are a faulty canister purge solenoid or a faulty tank pressure sensor.Read more: http://engine-codes.com/p1441_chevrolet.html#ixzz21ZntUMpS

HelloThe engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPEDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. (Theft Deterrent Module) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return because it is eliminated. This can also be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this. http://vatspasslockpasskeysecurityhelp.yolasite.com/

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Usually a blend door problem.The system is designed to default to the defrost position for safety.If the blend doors are vac operated, look for a vac leak.If electric, look for a failed motor or stuck door.

dissconnect all fuel lines and vent on front of tank dissconnect all fuel lines and fill tube hose drop tank and remove retainer clip with screw driver remove old pump replace with new one reinstall all parts and hoses

Hi Stoker, I'm not very sure what it is you can't do. Are you looking for the connector for your trailer? If so and you can't find it, maybe you need to install one? It's not such a tough job but it will take time, a voltage test meter and a few other tools. Uncover the electrical harness with the cables for the rear light units. Identify each circuit and the pins on the trailer for those lights and connect into those circuits and making sure you match the pins. Test the connections, not forgetting to attach the earth cable. Regards John

It sounds like you have a defective fuel pump. The pump is locate inside the fuel tank, the fuel tank must be removed to replace the pump. Please follow this procedure to remove the fuel tank.Disconnect neg battery cable, safely raise vehicle, place floor jack under tank, loosen gas tank straps and allow tank to slowly drop halfway, disconnect( this is the hard part) fuel lines,and power connections at tank. Drop tank. With a brass hammer/punch carefully remove retaining ring/seal.Reverse to install.A new pump module will cost you $300-$400 at the dealer. Don't use a cheap pump replace the entire assembly because this is a float/sender/pump/ in one. Replace your fuel filter too or the fuel pump warranty is voided..

Hi Jay, Think I've already answered this one. Regards John

Hi Palmer Jay, Take the vehicle for a diagnostic scan and have the fuel pump pressure checked at the same time. It sounds to me as if the pump may be defective and not giving the correct pressure. Also have them replace the fuel filter. Regards John

Codes

Print Stored fault codes may be erased from memory at any time by removing power from the VCM for at least 30 seconds. It may be necessary to clear stored codes during diagnosis to check for any recurrence during a test drive, but the stored codes must be written down when retrieved. The codes may still be required for subsequent troubleshooting. Whenever a repair is complete, the stored codes must be erased and the vehicle test driven to confirm correct operation and repair. WARNING The ignition switch must be OFF any time power is disconnected or restored to the VCM. Severe damage may result if this precaution is not observed. Depending on the electrical distribution of the particular vehicle, power to the VCM may be disconnected by removing the VCM fuse in the fusebox, disconnecting the in-line fuse holder near the positive battery terminal or disconnecting the VCM power lead at the battery terminal. Disconnecting the negative battery cable to clear codes is not recommended as this will also clear other memory data in the vehicle such as radio presets. The following are the codes for the 1994-95 models with the OBD I and OBD II systems. See Figure 1 through 6

Fig. Fig. 1: DTC chart for 1994 ECM models

Fig. Fig. 2: DTC chart for 1994 PCM models

Fig. Fig. 3: DTC chart for 1994-95 VCM models

Fig. Fig. 4: DTC chart for 1995 PCM models

Fig. Fig. 5: DTC chart for 1995 VCM-A models

The oil pump is located in the oil pan which is on the bottom of the engine.If you have 4wd then the front differential has to come off to get the oil pan off.Hope this helps.Good luck.

sounds like trouble with the switch on your heater control panel when turning it to air condition mode

Fuel pump

How about the spider injector that might be the reason your vehicle is running rough and using up tp much fuel. The fuel regulator is part of the spider injector and it costs about $40. or $ 50. but if the injectors are bad then you will have to replace the spider injector, which will cost you $200. or less. From my own experience dont jujust change the fuel regulator and then have to buy the spider injector. It is best to make sure that it is not the injectors also. The fuel regulator is know to go bad on 95 GMC Jimmy believe me I have had to replace many other parts because of the spider injector.Good luckLady Janette

a large book called an electronic component locator can pinpoint that for you. the book can be found at many dealerships, repair shops, and even your local auto parts store. such information is also often available on the computers at the same location and can be printed out for you. of the three, your local auto parts store might be the friendliest to provide you with the information.

In the glove compartment

Does the motor cut out when you push on the gas?

For fuel related problem,the help links are provided below.Click the link below to go through its procedure:----How to relieve fuel pressure? http://technoanswers.blogspot.com/2012/01/how-to-relieve-fuel-pressure.html-------- Refueling problem? http://repairhelpcenter.blogspot.com/2012/01/refueling-problem.html-------- Car consuming more fuel? http://repairhelpcenter.blogspot.com/2012/01/toyota-tercel-consuming-more-fuel.html---------- How to maximize fuel economy on your vehicle? http://schematicsdiagram.blogspot.com/2011/11/how-to-maximize-fuel-economy-on-your.html------- Fuel pump relay troubleshooting ? http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html------------ How to Increase gas mileage vehicle? http://schematicsdiagram.blogspot.com/2011/12/how-to-increase-gas-mileage-on-2011.html--------- How to Test and Replace Fuel Injectors? http://repairhelpcenter.blogspot.com/2011/11/how-to-test-and-replace-fuel-injectors.html ------------------- How to replace Fuel Tank Assembly? http://vwrepairhelp.blogspot.com/2011/11/how-to-replace-fuel-tank-assembly.html -------------- FUEL LINES AND FITTINGS ? http://repairhelpcenter.blogspot.com/2011/11/fuel-lines-and-fittings-on-acura-car.html ------------ Replacing Fuel Charging Assembly on Car? http://vwrepairhelp.blogspot.com/2011/11/replacing-fuel-charging-assembly-on-car.html ------------ How to replace Fuel Pressure Regulator ? http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-fuel-pressure-regulator.html --------------- How to test Fuel Pressure and replace Fuel Pump? http://repairhelpcenter.blogspot.com/2011/11/how-to-test-fuel-pressure-and-replace.html -------------- Car will not take fuel into the fuel tank? http://repairhelpcenter.blogspot.com/2012/01/car-will-not-take-fuel-into-fuel-tank.html-------------- PGM-FI Main Relay location? http://repairhelpcenter.blogspot.com/2011/11/pgm-fi-main-relay-on-acura-car-models.html ------------------ How to Relieve Fuel System Pressure on Car Models? http://repairhelpcenter.blogspot.com/2011/11/how-to-relieve-fuel-system-pressure-on.html----------------- How to Replace a Fuel Injector http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-injector.html---------------- How to Replace a Fuel Pressure Regulator? http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-pressure-regulator.html ------------- How to Replace a Fuel Pump? http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-pump.html------------------- HOW TO CLEAN A FUEL SYSTEM http://schematicsdiagram.blogspot.com/2011/07/how-to-clean-fuel-system.html----------- HOW TO REPLACE A FUEL TANK http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank.html-------------- HOW TO REPLACE A FUEL TANK CAP http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank-cap.html------------ HOW TO REPLACE A FUEL PUMP ASSEMBLY http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-pump-assembly.html----------- How to change fuel injector on gmc ? http://schematicsdiagram.blogspot.in/2012/03/how-to-change-fuel-injector-on-2005-gmc.html------------ Time to replace Fuel pump? http://schematicsdiagram.blogspot.com/2011/12/time-to-replace-fuel-pump-on-1998-ford.html----------- Emergency fuel shut switch location? http://schematicsdiagram.blogspot.com/2011/12/emergency-fuel-shut-switch-on-ford-car.html--------------- How to jump fuel pump? http://schematicsdiagram.blogspot.com/2011/12/how-to-jump-fuel-pump-on-chevrolet.html------------ Car wont start when cold? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html-------- Car wont start after sitting overnight? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-after-sitting-overnight.html--------- Car loses power while acceleration? http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html------------ Fuel leaks from fuel pulsation dampener? http://repairhelpcenter.blogspot.com/2012/01/fuel-leaks-from-fuel-pulsation-dampener.html---------- Car will not allow to put fuel? http://repairhelpcenter.blogspot.com/2012/01/car-will-not-allow-to-put-fuel.html----------- Adding performance chip to increase Fuel mileage MPG? http://technoanswers.blogspot.com/2012/01/adding-performance-chip-to-increase.html-------------- How to test Electric fuel pump? http://technoanswers.blogspot.com/2012/01/how-to-test-electric-fuel-pump-on-gmc.html--------- Fuel gauge drops to Empty? http://technoanswers.blogspot.com/2012/01/fuel-gauge-drops-to-empty.html----------- Fuel pump not working on Ford? http://technoanswers.blogspot.in/2012/01/fuel-pump-not-working-on-1991-ford.html-------------- Fuel pump has no power on ford diesel? http://technoanswers.blogspot.in/2012/01/fuel-pump-has-no-power-on-2002-ford-350.html------------ Pushing on the gas pedal but the car slows down? Gas pedal to the floor and the car slows down? http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html--------- Ford Fuel pump Relay and fuse location diagram? http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-relay-and-fuse-location.html-------- Ford inside fuse box diagram showing fuel pump relay? http://technoanswers.blogspot.in/2012/02/ford-inside-fuse-box-diagram-showing.html--------------- Ford fuel pump fuse layout diagram? http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-fuse-layout-diagram.html-------------- How to lower fuel pressure on Toyota? http://schematicsdiagram.blogspot.in/2012/02/how-to-lower-fuel-pressure-on-toyota.html------------ Fuel pump not running? http://schematicsdiagram.blogspot.in/2012/02/fuel-pump-not-running.html-------------- How to replace fuel filter on BMW?http://schematicsdiagram.blogspot.in/2012/03/how-to-replace-fuel-filter-on-bmw-525i.html----------This will help.Thanks.