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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900
Sponsored by: Dorman

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Old 05-29-2007, 01:53 PM
Join Date: May 2007
Posts: 3
Default diesel operating temp

our 99 suburban diesel runs at about 185 degrees hwy cruising, a little hotter climbing hills, at least that's what the gauge shows.

i'm wondering if 185 is normal, or maybe cooler that it should be ?? can't find info on normal opearting temp in the manual.

thnx ks
'94 gas suburban
'99 diesel suburban
'03 trailblazer
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Old 05-30-2007, 10:56 AM
Join Date: Aug 2006
Posts: 2,424
Default RE: diesel operating temp

Those temps are spot on sounds like she's running good, keep in mind also that guages are not 100% accurate.
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