ls1adamls1

iTrader: (9)

hey everyone,

i have a 99 chevy k2500 with the vortec 454, yeah its not n ls1 but idk a forum for this. so my issue is the truck will not warm up past 130* and the heater only blows luke warm, the heater used to make me sweat it got so hot.

btw, when i first got the truck it always ran at 160* even when i towed with it. so it has always ran cool just not this cool.

my only guess would be the thermistat is bad.

vjo90rs8

iTrader: (9)

broken gauge? I find it very hard to believe your are only running 160* while towing. I would find it hard to believe the truck would run 160* or less when driving on the freeway in the cold. Are you sure the gauge isn't in Celsius?

ls1adamls1

iTrader: (9)

yeah im sure, i have even hooked up a code reader to the truck which you can also see how other things are functioning, such as tempature, air/fuel ratio etc.
and when i looked at the temp, it was reading correct.

today i tried using the heater, it got warm, then went cool.

could the t-stat be stuck open not allowing everything to heat up??

Blazingz28

iTrader: (5)

when a shop ""fixed"" my friends parents PT cruiser, they straight up took the thermostat OUT.

Check and make sure you even have one..

kistlerjm9

iTrader: (24)

replace the thermostat

ls1adamls1

iTrader: (9)

ok i got a 195 t-stat as this is what is recommended, it does not heat up anywhere close to that.

ill replace it tomorow, and let you all know what happens.

thanx again for all the input.

SOMbitch

iTrader: (8)

Does your heater core kinda gurgle cause it clogged. Dex-cool has been known to do this. What does the temp guage say? That t-stat would be my first bet.

ls1adamls1

iTrader: (9)

i replaced the t-stat today, the truck is running at normal temp, and heater is blowin hot again.

thanx for the input.