Top 20 2004 Chevrolet Express Questions & Answers

Striker post If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_f3d50d49191a7202

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if you have specific details as to the times , rpms , conditions that cause the problems take it to an accredited auto transmission specialist shop and have it diagnosed with your details they should be able to pinpoint the fault as it will not be uncommon

Should be in the upper line that goes into the evaporator

This may be related to the antitheft system The system is known for turning off the starter and/or injectors when it fails. Is there a light on the dash that says SECURITY? This is a common problem worth looking into. http://www.diy-gm-security.com/

I had the exact same problem with the exact same Van. I simply adjusted the throttle cable under the hood. So that instead of trying to idle around 350rpm, it is now idling between 500-550rpm. Hope this helps. *I did, at first, change the Mass Airflow Sensor and new Air filter. That seemed to help a bit, but I would still get low idle code. And it wouldn't idle until the engine warmed up. After adjusting the Throttle cable, I've had no more issues.

Check your shop manual.

The HR arrow is the left one and the MIN arrow is on the right.

Here's the instructions from the manual:

Press and hold the HR or MIN arrow for two seconds.
Then press HR until the correct hour appears on
the display. Press and hold MIN until the correct minute
appears on the display. The time may be set with the
ignition on or off.
Hold either arrow down for two seconds and then you can adjust the hour and minutes.

Turn signal doesn't have a relay. If your talking about the flasher, it is built into the hazard switch. Which yours may or may not be in the turn signal switch. If the hazard is on the column, then it is in the switch. In the dash, it's not. I haven't worked on the express, but that's where GM puts them.

because ignition key has a chip that allow ecm to start the engine if you are using a key copy it will not working, if you don't have the original key with the chip on it you must take vehicle to the dealer to disable the security program on engine computer

Just go onto google and type in how do I change a brake light on a Chevy express van you will be shown a video of how to do it hope this helps

Front or rear?

replace discpad or breakshoe

Hi Gary, The code is indicating a malfunction of the injector circuit, meaning it could be a crank or cam shaft pick up sensor malfunction, a knock sensor, or the ECU, cables or injector. Get me some additional info in relation to performance and other symptoms and we'll see what we can discover. Regards John

replace the discpad or breakshoe

50 thousand miles

There should be a diagram on the underside of your hood. Should also be one in your owners manual. Autozone can pull one up easy too.

80% of the belt will go around the crank pull. that makes it easy then 80%

see attached - I assumed you have ac

remove the belt unbolt the tensioner and replace. the center of the tensioner has a half inch socket in it . put your pull handle in that socket like you would a normal socket wrench and rotate to relieve pressure on belt remove belt unbolt tensioner