Attention: TDR Forum Junkies 
Heres what the on the bottle statement says! Prestone extended life 5/150 is recommended for use in all 1996 and newer GM vehicles "(EXECPT)"! Geo and Saturn, as well as all other cars and light duty trucks with "ALUMINUM RADIATORS"! My 2001. 5 2500 truck has an alumnium radiator, how about yours? I am going with the Cummins recommended coolant and enhanced change change/flush periods... This is on the bottle guys, so if you use it in any aluminum radiator equipted vehicles you are going wrong as stated by the Prestone application. I just thought that you would like to know. Wild Bill :--)2001. 5 2500 Quad, lwb, auto, 3:54 tow pkg, 41 gal bed fuel tank, BHAF afe /w custom blt cold air ram, custom Flow Master equptd extractor 4"exh, EZ, 275 inject, fuel cooler, big permacool trans cooler /w fan & thermostat@180F, BD T/C /w power loc, BD valve bdy,pacbrake w/BD brain,guages on everything,lots a pretty stuff, pulling a 35ft 10k total wt Sportsman 5er/w HD road king in trailer cargo area. Going to See America the right way! I love the smell of diesel in the morning! Wild Bill & Jackie Adams Tomball, Tex -- email address removed --
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