Thermostat Housing
#4
TECH Senior Member
The housing you show is for GenIII (requires a GenIII TS (has ears that mate to those tangs)).
The TS you show is for GenIV (requires a GenIV housing (has no ears, and no harness post)).
Also note that a GenIII housing will not fit into a GenIV pump (unless you file the tangs for clearance).
The TS you show is for GenIV (requires a GenIV housing (has no ears, and no harness post)).
Also note that a GenIII housing will not fit into a GenIV pump (unless you file the tangs for clearance).
#5
TECH Senior Member
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#10
I just went through the same thing. GM has two pumps, the replacement pump has the two piece t-stat.
P/N for the two piece housing is 12600172 local dealer wanted $61
P/N for the two piece housing is 12600172 local dealer wanted $61
#11
TECH Senior Member
#14
TECH Senior Member
Do you have old-style pump and old-style TS/housing...?
Does your housing fit into the pump...?
If it doesn't (ears of housing interfere on size of bore in pump) then you have the new-style pump.
Does your housing fit into the pump...?
If it doesn't (ears of housing interfere on size of bore in pump) then you have the new-style pump.