how do i tell what type fuel pump for 2001 gmc sierra TCF or TCU?

[Gary Harvey]

There are 2 type fuel pumps for 2001 GMC sierra type TCF or TCU
TCF has 2 electrical connectors & TCU only has 1

 

[Molson02536]

There are 2 type fuel pumps for 2001 GMC sierra type TCF or TCU
TCF has 2 electrical connectors & TCU only has 1

Yes there were 2 types of pumps used. The codes are TCF and TCU; you will have one or the other. TCF seems to be more popular, and you have to drop the tank and look at the stamp on the top of the pump to determine which type you have if you buy used. If buying from the dealer new, you will have to have your VIN to confirm. TCF is not listed in the RPO codes, why this was left out I don't know. It would have made finding a replacement easier.

Sorry for the bad news.