Anterior introduced in 1982, GMC Sonoma is a compact pickup Motor lorry manufactured by GM. A contemporary siring arrived in 1994 with 4.3L Vortec V6 and 2.2L four-cylinder engines. As the inline alteration had one one exhaust manifold, it required alone one O2 sensor to state and track the air-fuel ratio for capital performance and fine emissions. On the other hand, the displacement of the V6 engine required two O2 sensors, one for Everyone exhaust manifold.
Oxygen Sensor Placement
A Correct working sensor Testament constantly fluctuate the voltage amount from approximately 100 mV -- high oxygen content, lean mixture -- to 900 mV -- low oxygen content, rich mixture.
Part Replacement
GM still supplies oxygen sensors at the price of $162.14 per piece as of January 2011.The heated oxygen sensors are mounted in the exhaust system, where they can overseer the O2 content of the exhaust Gauze stream. They then correspondence the gathered clue to engine machine unit, which adjusts the proportions of fuel injected into the intake manifold to compensate for excess air or excess fuel.
Sensor Specifications
The sensor produces a voltage output when O2 is exhibit in the exhaust transaction.The original equipment manufacturer part number is 25312200.
Replacement Procedure
To replace the oxygen sensor, first disconnect the negative battery cable. Determine the location of the oxygen sensor to be replaced. Raise the vehicle. Disconnect the oxygen sensor harness connector. The harness connector may typically have either a 1-by-4 or a 2-by-2 configuration. Use the J 39194 -- oxygen sensor wrench -- to remove the sensor and replace it with a new one.
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