ok i got a 89 blazer with the optional electric cluster. everything is working fine except for the gas gauge and the miles and trip meter. ok so the gas gauge reads 3 bars so say almost empty and it will move between 1 and 3. i have put gas in it and it stays there and bounces back and fourth every few minutes and wont show if its increased gas or not. so im not sure how much gas i have and would like it to be fix so any advice on what i should check first would help. as for the miles and trip meter they just plain dont come on at all so not sure about that. \

any help asap would be nice
thx