why is the gas cap so important to fuel gauge problems on 2001 Chevrolet Blazer

yes i know it keeps the fuel in an out fuel gauge seems to be linked to gear lever been in neautral could it be earth wire prblem thanks

by in Wake Island, HI on April 04, 2014
1 answer
ANSWER by , April 04, 2014
Have it tested with a scanner that can test the instruments for a problem/codes...