Lately my gas gauge has had a mind of its own. It bounces back from empty to full. Most of the time it happens when the engine is running in park. It goes to "E" then I shake the truck and it bounces back. Has this happened to anyone else?????

 

what year?...2000's to about 2002 were pretty bad about the sender going nuts

 

Oops...its a 2001 sierra

 

yes,i imagine the sender in the tank is out...i'd do a complete fuel pump...CAUTION..use ONLY an a/c delco pum,p...do NOT thrifty shop for a pump....install that,or live with what ya got

 

thanks for the info argon. When I bought the truck last year I purchased a warranty so i'll have to check to see if it is covered. Im pretty sure it is.