Faithful GMC owner

Forgot to mention, currently own '13 Denali Duramax/Allison 3500 dually. We are fulltime rv'ers pulling a 39' fifth wheel as our home. Love that D/A!!!
 
04 5.3 sierra 2wd losing a lot of coolant and oil but no signs of leak........ 180k miles. Any ideas?
 


Back
Top