How to fix a P1875 for a 99 chev blazer 4wd - 1999 Chevrolet Blazer

SOURCE: need to change alternator

ok no problem. first off unhook the possitive on the battery. then find the belt tensioner. there should be a sqaure hole in it for a rachet to go into. use the rachet(usually the 3/8's drive)to move the tensioner to where you can slip the belt off the alternator. then remove the nut off the back of the alternator to take the hot wire off. Then there is a plug on the back of the alternator. unplug it. next take the three bolts out of it and remove it. then put the new one on and repeat steps in reverse. If you have problems with how the belt goes back on then look around the engine bay. usually there will be a sticker with how it goes.

Bruce Bracey

• 1000 Answers
• Posted on Oct 10, 2009

SOURCE: 99 chev blazer, service 4wd light is on. Simple

There are a couple of fuses you will want to check. They are located in the under hood fuse box. The TBC ( truck body controller) and ATC (automatic transfer case) fuses.
If both are good, take the truck to your local Auto Zone and ask them to scan the vehicle for "trouble codes". Write the codes down and respond back.
Below is a diagram of the under hood fuse box and the fuse locations.

SOURCE: 2003 Chev Blazer Service engine light came

Ok, first, you should clear the fault. Sometimes the system will get a bug, and there's not really a problem. You can do this by disconnecting the battery for 10-20 minutes. This will clear any faults. Next, see if the light comes back. If it does, then you can take it to get the codes scanned at a parts store(many do it for free.) Once you get the code and description, you have to troubleshoot the specific system that the code covers. The check engine lights are usually triggered by sensors going bad. On occasion, you will get an actual mechanical failure that will cause one.

SOURCE: on my 99 chev blazer the serice 4wd light comes on

Your 4WD control module has detected a problem in one of the circuits that are controlled by it. You will have to scan your computer system to find out what circuits are failing and diagnose the problem according to the fault codes retrieved from the computer.

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