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Dave J
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DDave J posted the thread Need to find out where pin #25 is on an early 99 suburban 5.7. in Engine Performance + Maintenance.Need to find out which harness pin #25 is on an early 99 suburban 5.7. Tan white stripe. low voltage return for bank 1 sensor 1 o2
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DEarly 99 gmc sub 5.7 O2 sensor not reading. 12volts and good ground for heater. Getting 4.5volt reading on blue/white stripe wire with...
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