I have a 1999 Silverado Z71 4x4 with 50,000 miles. Power is good and I get reasonable mileage (14MPG). I have not had any engine related problems at all. Other than a sticky throttle body that was repaired and later replaced by the dealer under warranty.
I change the oil every 3000 miles (Mobil 1) as I pull a 5500LB boat. Of the 50K miles on my truck, 45K are pulling a boat.
<DIV><FONT face=Arial size=2>Any experience out there with either of the newer
chevy v8 engines? Looking at either 4.7 or 5.3(?) V8 engines in an
extended cab 4x4.</FONT></DIV></BLOCKQUOTE></BODY></HTML>