Where is the air pump on a 2001 Blazer 4x4 with a 4.3 and automatic?

Also,does anyone know where the power brake control module relay is?

My codes tell me the pbcm relay circuit is bad , and the other code tells me the secondary air system has failed.

And last but not least, my wifes blazer is a 2000 with the 4.3 engine also and the fuel guage reads funny. As long as there is a 2/3 tank or better it reads fine. It gets to about 1/2 guage and it fluctuates between empty and full. Sending unit maybe? Or dash cluster messing up?

Any ideas on any of these?

Any help would be appreciated

 

The AIR pump is under the radiator near the inside of the passenger side frame rail.

The EBCM (electronic brake control module) is located on the driver side fender.

Put each code, separately, into the search feature on the site and you should find plenty of information about them. The OBD2 code index link in my signature has many of the commonly found trouble codes which will guide you through the diagnosis.

Fuel gauge problems are also covered elsewhere. The search feature again will help you find the relevant information.

 

well finally had time to mes with it today. My air pump is working, there was a bit of water in it above the vacume valve. the vacume swith is functioning and i've plenty of vacume to it when the engines running. the check valves prove to be good and no air leaks or melted fittings. everything seems to be ok , but i still get the p0410 code. any ideas of where to look next? any help is appreciated