Dear Car Talk: I have a “no heat” problem on my ‘99 Pontiac Grand Prix SE 3.9 liter. It runs fine with no overheating (yet). I suspect a plugged heater core and want to bypass it for the rest of the ...
A car heater that only works at speed may be low on coolant or have a clogged heater core. For a low-mileage car stored outside, follow the manufacturer's maintenance minder and consider a brake fluid ...
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