i have a 2004 gmc sierra 2500hd duramax with 130,000 km. i have recently started to have issues, replaced both batteries ( no complaint there), tow haul mode has not worked for some time (replacement quoted at 150.00), real axel seal leak (replaced with help from this site), front wheel bearing replaced (also with help from this site),tach reading all over the map and just recently engine light stays on. told the tach needs instrument cluster replacement (aprox. 500.00) would this also cure the engine light funtion? any help appreciated

 

to DB!