2004 Chevrolet Express - Page 9 - Answered Questions & Fixed issues

have a load test done on the battery to check for failed cell. Clean the battery posts and terminals to shiny clean and ensure that they are tight. Check fusible link near the battery

change the relay, its stuck in the contact positon

It is normal. Some cars sound an alarm when the key is pulled out from the switch and the lights are still on. Good luck

Are you wanting to reset the error codes??? If so, go to one of the Auto Parts stores that can "lend" you an OBD scanner. Easy to hook up and in most cases, the guys there will help you. With the OBD scanner attached, it will allow you to RESET codes... Other than that, there is no RESET for the computer.You can unhook the battery for 24 hours but...then you have to set your clock, radio stations, etc... Easier to stop by AutoZone.

Do the brake lights work? If so, try turning ignition to on, no dash lights, and not to start and shifting to neutral then try to start it. If this allows it to start in neutral. Then it is the Transmission brake safety switch. If the brake lights don't work it's the brake light switch.

there is a light module under the dash that works all that stuff they tend to get moisture in them and short out, its located above the gas pedal about waste high while seated

run the fault codes and look for a TCM problem. Have a pressure test done on the gear box to test for clutch and band adjustments.

Dealer only i think you will find

sounds like it might be a bad switch I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_54ae41aaaffbab00

Any chance the check engine light is on ?My first thoughts are fuel pump, ignition module or coil. It may be tough to find if you can't duplicate the problem in a repair shop. Someone may have to take tools and equipment on the drive and troubleshoot it when it happens.When it happens, will it sit and idle or does it shut down ?

Vehicle? Do all the windows work when the switch is replaced? How long does it last? Are one of the other switches stuck in position?Do all the other swicthes seem okay?On gm they all run through drivers side. Some systems are different. From the drivers side to say the passenger side front there are two wires that switch polarity between up and down. one wire is negative for up and positive for down, the other wire acts exact opposite. the other system the motor is grounded and there is a positive for up and a positive for down and no ground runs through. but I would say a bad door seal somewhere(bottom of driver window,at hinge tube conduit, or between door and vehicle up by windshield as water will follow seal around to inside of door)of if its a ford could be a gem module problem.

The filter should be in the fuel line between the gas tank and the engine. The line runs under the floor along the frame.

Could be at back under car left or right near tank.

Hello

The engine and the automatic transmission in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a filed pump or other pressure related problems.

the high humidity (water) is attacking your electrical starting system, whens the last time you changed your spark plug wires , distributor cap & rotor ? how about your fuel & air filters ? cleaned your battery terminals ? try it , it will help !!!!!!!!!

Check your fuse box ,on newer cars and trucks they are large metal encased fuses usually under the hood in relay box or under back seat,should be able to find exact location in owners manual .

you'll need to remove the doghouse, the cover over the engine in the passenger compartment. Sometimes you have to remove one of the front seats to get it out.

The oil pressure switch/sending unit will be just to the drivers side of the distributor. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

there is a switch to turn it on while driveing see if is on or the switch on the door could be bad

wireing harness short

From Gates Automotive