1988-98 GM C/K1500 OBS Pressurized Coolant Surge Tank 4l80 coolant level sight glass

coolant level sight glass

Similar to Mercury 861776A2

-Trim the bottom of the NBS fan to fit around the bottom of the GMT400 core support

made to replace those flimsy plastic factory parts

These fit against the firewall in the stock location with no modification

1988-98 GM C/K1500 OBS Pressurized Coolant Surge Tank 4l80 coolant level sight glassPressurized coolant surge tank specifically intended for LS LT swap C K1500 OBS trucks and SUVs using a stock style sealed coolant system. This tank has a Pressurized cap, coolant level sight glass, and 1 2" NPT welded fitting on bottom to be plumbed inline with the heater core similar to 99+ Silverados. Bolts directly in place of the stock plastic over flow tank on the firewall with no modifications with stock inner fenders. This tank works similarly