Originally Posted by forddieseldoctor
If you have 2 large relays right next to one another then one is for the intake heater and the other is the glow plug relay. I was told by my parts manager that they are not interchangeable. Different part numbers. The glow plug relay can be identified as the one that has the brown and yellow wires coming off of one of the large lugs. Also if my memory serves me correctly I thought that all excursions were california emissions. And if that's the case and they have the glow plug module with the 2 large black and green connectors then that is not interchangeable with the relay that you purchased.
i bought my excursion in alaska. i was about to buy the module but decided to check the part instead. good thing. it is the gpr. i just queried carquest and napa online and found the parts gpr109/110 from napa and 56-2430 or 56-2426 from carquest. the starter solenoid i have is a 25-1522. i'll go in an exchange tomorrow. the carquest parts look like the one i have in the car. plus, they are made in the US not China. they may last. the gpr i currently have is the original and the excursion has 215K miles on it. my wife loves the car, crashed twice in it here in alaska. both times she was towed out of the snow with no major issues.
thanks for the help. i'll let you know tomorrow. maybe i'll hold onto the solenoid. i may need it.