Hi, I have a 1998 suburban ls 1500 petrol 5.7L, auto, imported to Australia by holden. It has aprox 118000kms. The problem is the fuel gauge needle is not steady and moves back and forth from where is should read, it is a fast oscillation and when you look at it, it appears blurry. As warranty is in place the dealer replaced, the dash cluster, the fuel sender unit, later on the fuel pump and filter as the pump developed a fault and had a aucto electrician go over it for foreign earths etc with no fault found. The fault does not appear until the car is driven for about 10 to 15 minutes (about 10KM or so), when started in the morning from cold or after is has been off for a while all is normal. When the fault is there and if you turn off rhe engine and then turn on the ignitioning as far as you can with cranking the engine the fuel gauge needle moves all the way over to the full mark and back again to its correct level, still oscilating.
the dealer has given up due to lack of knowledge and it would be difficult to get them to try any fuel sender untit replacement as it would be difficult to convince them that the new one could have been faulty as well. Ithin that temperature is factor in this fault as it is not there when cold. Evrything else electronic in the car works fine, no noises, hums, smells etc.
any suggestions would be appreciated.