20 Most Recent 2004 Chevrolet Express - Page 9 Questions & Answers

Instructions too long to write here. you can find them in any cheap manual such as haynes. Most important part of job is to make sure you remove ALL of the old gasket on block before replacing with new, and to re-check all hose connections after you run it for a while to prevent leaks. Make sure you can remember where belt routing is so that you're not stumped when you go to put it back on.If it overheated, it's wise to replace thermostat...they get weird after overheating.

Yes that is correct.There is also a coil that fires the spark plug for each cylinder.There are specific tests for each component so you can find out which part is bad.compression could also be an isue not likely if the problem came all the sudden.

the first thing to test is the [bitron] sensor its on the side of the radiator this sensor overides the ign system.a simple test can soon establish if this the fault.to test ;1 disconnect the wiring plug from bitron switch ,bridge the two contacts in the wiring plug useing a lenth of spare wire and switch the ign on if the fan now operates the switch is faulty [replace]hope this helps you.adrain

You have a cylinder misfire. That is the only thing that will flash the check engine light. With the van running spray the plug wires with water. Watch and listen for arcing. If there is, replace that or all the wires. It is possible for new wires to be bad. Next check the cap and rotor buy spraying them with water, than removing and looking inside for signs of burning or anything that will hinder the spark. Last check the spark plugs for carbon tracking (small black lines in the porcelin), caused buy hair line cracks. If you dont find any thing, check it again. With no other codes it is very unlikley that anything else is causing the misfire.

hi you usuraly can use a long screwdriver to use as a stop to get the big nut off.depending or the rotation of your motor will determin the rotation to remove the big nut.if fan rotates clock wise turn nut clockwise.if counterckockwise turn nut counterclockwise.

hi it is in the verry front on top of your motor.follow your upper radiator hose to engine and it is under the housing.

I have the same problem with the side doors of my 04 express. I put penetrating oil on the hinge pin with a hypodermic needle (hard to find). It is important that the oil gets into the hinge. I bent one set of hinges and broke a hinge because I waited too long to oil the hinge. The door may not close correctly because the hinge may be slightly bent. Keep all other hinges well lubed especially during the winter months when the hinges can be exposed to road salt. Fixing a bent hinge is difficult at best.

HI............
Check if the SECURITY LIGHT is Blinking or on.
Or off.
Let me know if you have replaced any electrical part.
Or if have replace the lock Cylinder.

I will try to help you.

Thank you.

radiator not the greatest when you ask the engine for more power radiator doesnt cool engine enought thanks pierre

you have to reove the front air filter look at the upper radiatir hose follow the hose to the engine its under that housing hope it FIXYA our problem thank you pierre

Question edited for clarity. Chimes are normally activated from the Body Control Module from information given by a switch or sensor, so pulling a fuse is not an option. https://www.google.com/search?q=1982+CHEVY+EXPRESS+VAN.+Dinging+bell ..

Not told! However, this gives a clue right here on Fixya

SOLVED: Location of fuse box for license plate light on a - Fixya

https://www.fixya.com > Forum > Cars & Trucks Oct. 23, 2011 - location of fuse box for license plate light on a 1998 chevy cargo van - Cars & Trucks question. 1 answer · 3 votes: The license plate bulb is fed off the same fuse as the parking lights/tail lights.

Chevrolet Express (2003-2020) fuses and relays

https://fuse-box.info > chevrolet > chevrolet-express-20... Fuse box diagram (location and assignment of electrical fuses and relays) for Chevrolet (Chevy) Express (2003, 2003, 2005, 2006, 2007, 2008, 2009, 2010, ...

https://www.google.com/search?q=2017+Chevy+Express+2500.+I+need+the+backup+camera+wiring

The rear auxiliary heater and air conditioning control replacement procedure starts with removing the HVAC control assembly bezel (trim) from the headliner. Next, the headliner must be lowered in order to access the rear of the HVAC control assembly. This requires removal of the windshield garnish molding (A-pillar trim) and upper pillar garnish molding (B-pillar trim) at a minimum. You may be able to gain the necessary access by allowing the headliner to "hang" slightly rather than removing it entirely. After this is done, the electrical connectors can be disconnected and the HVAC control assembly can be removed from the headliner. You can read more here: https://www.yourmechanic.com/article/how-to-replace-an-ac-control-module-by-spencer-clayton

https://www.modifiedlife.com/2019-chevrolet-express-radio-wiring-diagram/

Overheating fuel pump or ignition module?

2004 Chevrolet express 3500 does not have A filter for the cab or a filter on the incoming air that comes in through the area behind the hood in the center of the van. You can see the vent intake or vacuum operated blending door if you look through the plastic screen part of this trim piece with a flashlight it is down and to the left. My Xpress 3500 Cutaway has a trail light motorhome attached I'm assuming that this is also true for the 2500 van. I found this out the hard way this area got filled up with sand and leaves there's a drain at the bottom and it was clogged the blending door or vent door allowed the sand leaves to go directly into the blower motor and then next the heater core this all had to be washed out and the heater core sucked clean with a vacuum since it is nearly impossible to access it through the passenger side of the cab I removed the blower motor, cleaned that and then used a vacuum with an attached piece of PVC pipe three-quarter inch and a 90 on the end and carefully put it through the box where the blower was and into the side where you can see the heater core itself.. the only thing I was able to do from the passenger side was pull the cover down and out exposing the ac coil enough to blow compressed air through it back towards the heater core . If I'm not mistaken after you remove the screws holding this pice on the passenger side below the dashboard , where a glove box would of been there are screws that are not accessible you are directed to cut the top side seam to remove it . This I found from reading the instructions for replacing the heater core ,I'm hoping to find some sort of filter offered to fix the intake, if not I think a piece of washable filter material cut accordingly and placed in front of the vaccume actuated blending /vent door , the 1" thick green or blue hvac washable material is what I am referring to . You would need to take the windshield wipers off and the plastic piece below that spans most of the area between the back of the hood and the bottom of the windshield you could put a pice ofthe washable filter material here in front of the vent door . As for the interior cabin filter I'm hoping some one makes in

fix the leak is normally the easy way

Well throwing parts at it usually doesn't work - 300 is the most annoying since it's a multi misfire not designed to a specific problem - misfire can be ignition - fuel - exhaust-or mechanical problem you need to check and test components I.E. Crank sensor-fuel delivery-valve lash-cat converter etc anything basically can cause misfire not just simple tune up

You didn't take it to a good enough mechanic . Backup Lamps The B/U LP 20 A fuse in the underhood fuse block supplies battery positive voltage to the normally open park neutral position (PNP) switch. When driver places the gear selector lever is in the REVERSE position, the switch closes and the voltage is from the switch to the powertrain control module (PCM). The PCM signals the BCM on the class II serial data circuits that the backup lamps are requested. The BCM supplies voltage on the backup lamp supply voltage circuit to the backup lamps and to the automatic day/night mirror. The backup lamps are grounded at G401. Voltage for the backup lamp supply voltage, without RPO YF7 the courtesy lamp supply voltage, and with RPO YF7 the courtesy lamp high control circuits is from the TBC 2 fuse 18 in the underhood fuse block directly through the BCM to these circuits. Backup Lamps Inoperative Step Action Yes No Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views 1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2 Go to Diagnostic System Check - Vehicle 2 Verify that the backup lamps are inoperative. Do the backup lamps operate normally? YES - Go to Testing for Intermittent Conditions and Poor Connections NO - Go to Step 3 3 Is only one backup lamp inoperative? YES - Go to Step 5 NO - Go to Step 4 4 Use the scan tool to check if there are any codes set in the current or history Powertrain DTC Information. Are any codes present? Go to Diagnostic System Check - Vehicle Go to Step 6 5 Test the backup lamp supply voltage and ground circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs. Did you find and correct a condition? Go to Step 10 Go to Step 8 6 Test the backup lamp supply voltage circuit for the following: • An open • A high resistance • A short to ground Refer to Circuit Testing and Wiring Repairs. Did you find and correct a condition? Go to Step 10 Go to Step 7 7 Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? Go to Step 10 Go to Step 9 8 Replace the inoperative backup lamp bulb. Refer to Backup Lamp Bulb Replacement . Did you complete the replacement? Go to Step 10 -- 9 Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? Go to Step 10 -- 10 Operate the system in order to verify the repair. Did you correct the condition? System OK Go to Step 3