Fix a co281 code on a 2002 s10 blazer - 2001 Chevrolet Silverado 1500

SOURCE: where do i plug in at to check codes on 85 s10 blazer?

under drivers dash let me know what you find ok

SOURCE: abs codes co281 & co265

the first of the two codes is for the brake light switch, the one that is under the dash attached to the brake rod and brake peddle. Not much to diag on that one, if its bad it's bad, and when it sets the code that means it's bad.
The second one is for the abs modual, it's under the truck on the drivers side. It is bolted to the top of the thing that has all of the brake lines going to it. MOST all of the time that code is set the modual is bad. It can be a little hard to get the bolts out they are torqs 20 or 25(i'm getting old). There are four of them holding down the modual. There are also a couple of connectors going to it. And some of the time it will blow the fuse for the abs under the hood(its in the underhood fues block). Make sure to clean off the modual before you pull it out. You don't want dirt getting in the solinoids for the BPMV(that's the thing it's bolted to).

SOURCE: How do you change a fuel line on a 2002 S10 blazer

First you need to unsrew the gas cap to relieve the pressure in the fuel system and than remove and replace the fuel line.

SOURCE: 2002 s10 blazer code p1638

The PCM (powertrain control module) uses the generator field duty cycle signal circuit to monitor the duty cycle of the generator. The GM PCM is set to expect a charging system field of 0 to 30% when the key is off and the engine is not running. If it sees more or does not see any a code is stored. When the engine is running the PCM is set to see a charging field duty cycle of 0 to 100%.A PennTex GM replacement charging system (prior to 2008) normally has 11 to 12 volts on the blue field wire. (100% field duty cycle) with the key on and the engine off. This being more than the 30% the PCM expects to see causes a code to be stored. If the charging system has been verified then the code can be treated as informational. This was a known issue published by PennTex USA on 10/1/2008.

I hope this helped. God Bless.