Symptoms - Engine Controls. GMC Truck Canyon Pickup

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2004 🢒 Canyon Pickup - 4WD 🢒 Engine 🢒 Engine Controls - 2.8L (LK5) 🢒 Symptoms - Engine Controls

Before using this section, perform the Diagnostic System Check - Engine Controls and verify all of the following conditions:

•	The powertrain control module (PCM) and the malfunction indicator lamp (MIL) are operating correctly. Refer to Malfunction Indicator Lamp (MIL) Inoperative .

•	Diagnostic trouble codes (DTCs) are not stored.

•	The scan tool data is within the normal operating range. Refer to Scan Tool Data List .

•	Verify the customer concern and locate the correct symptom table. Inspect the items indicated in that symptom table.

•	Several of the symptom procedures ask for a careful visual/physical inspection. This step is extremely important, and can lead to correcting a condition without further inspections and can save valuable time.

•	If the intermittent condition exists as a start and then stall, inspect for any DTCs related to the theft deterrent system. Refer to Diagnostic System Check - Theft Deterrent in Theft Deterrent.

•	Verify the proper installation of any of the following aftermarket accessories:

•

Lights

•	Cellular phone

•	Remote starter system

•	Aftermarket installed alarm

•	Use the following tables when diagnosing a symptom concern:

•	Poor Fuel Fill Quality

•	Hard Start

•	Surges/Chuggles

•	Lack of Power, Sluggishness, or Sponginess

•	Detonation/Spark Knock

•	Hesitation, Sag, Stumble

•	Cuts Out, Misses

•	Poor Fuel Economy

•	Rough, Unstable, or Incorrect Idle and Stalling

•	Dieseling, Run-On

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•	If the condition cannot be isolated using the appropriate table, refer to Intermittent Conditions for further diagnosis.