My brother wants to get codes for his 1990 Chevy Silverado 2500, but being a 90, wouldnt it be OBD I? If I remember correctly, shops cant pull codes for that can they? Cant they only hook up to OBD II?

Anyone know where I can find a codes list for this truck, lol. Google has been no help to me.

Thanks -Dennis

They should be able to hook up. My brother has an 88 toyota pickup that was in the shop last fall and the shop was pulling codes off of it.

Even some of the more expensive handheld OBDII tools at like autozone (actron) have adapters so that they can be hooked up to an OBDI vehicle...

A mechanics shop should be able to, an autozone or something like that won't be able to.

http://www.actron.com/product_detail.php?pid=16150

^^^ Example of actron scanner that is OBD I compatible that autozone sells.

Was not saying that whatever autozone uses to scan cars was an OBD I compatible piece...

Just spreading the word that you can get an OBD II device that also has the ability to pull codes (with correct adapter) from and OBD I equipped vehicle.

Should be able to retrieve them for free.

http://www.freeautomechanic.com/diagnostictroblecodes5.html

search for the correct code meanings but the process should be the same, OBD is standardized.

I'm going to move this to Ford focus and gen car chat for better exsposure.

I had an 88 GMC....not sure if that is OBD I or anything but all you had to do was jumper two pins and read the number of check engine blinks and go from there.
Am I helping at all ? lol.

Check out the link iminhell posted. It's really easy to check the codes. Any jumper will work: paperclip, small wire, whatever. Auto Zone used to (might still) give you a 'key' for free. Just a piece of metal with two prongs that you put into the obd connector.

Jumper the pins, turn ignition to run. Engine light will flash once, pause, flash twice. This is a code 12 which just means the computer is in diagnostic mode. You will get this code three times, with a little longer pause in between each set of one, two flashes.

After you get code 12 three times, then it will give you whatever codes are stored, in the same format. Say for code 46 you'll get four flashes, short pause, six flashes, etc. etc.

Also most (if not all) vehicles '96 and after, are OBDII. There were a few before 96, but not the '90 Chevy in question.

any good shop will beable to read OBD1. I have found that OBD 2 vehicles are much less confusing to diagnos. But still not hard if You know what you are doing