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Part 1 - Soak and Idle
1.
Park the vehicle for 8 hours with battery connected. The vehicle should NOT be parked in the direct sun light. Direct sun light may cause the
ECM to fail a diagnostic test and set a fault code. The coolant/engine temperature must be below 113°F (45° C). NOTE: Turning the ignition
on for any length of time to check the temperature may cause you to have to soak an additional 8 hours.
2.
Start the engine and idle for at least 3 minutes.
Part 2 – On-The-Road Driving
1.
Drive the vehicle with the accelerator between ¼ and ½ throttle for 5 minutes.
2.
Drive at a steady speed with the engine speed between 1200 and 3000 RPM for 10 minutes.
3.
Accelerate to 55 mph.
4.
Shift to a lower gear, second is preferred but choose a gear that will give you an engine RPM between 2500 and 4000 and not over speed the
engine.
5.
De-accelerate in that lower gear without using the brakes to 45 mph. Repeat steps 3 - 5 a minimum of four times. This is to activate "Decel
Fuel Cut-Off".
6.
Put vehicle in drive and continue to drive normally for at least 5 more minutes.
7.
Accelerate vehicle to 55 mph in a gear that will give you an engine speed of approximately 2500-3000 RPM.
8.
De-accelerate in that gear without using the brakes to approximately 40 mph. Repeat steps 7 and 8 a minimum of 4 times.
9.
Come to a stop and idle for 30 seconds (in gear for automatic transmission).
10. Turn off engine and allow to sit for at least 30 seconds.
11. Restart engine and repeat steps 1 through 9.
12. That completes the Emission Test Station - Prep Drive Procedure.
Coupon for Crankshaft Position System Variation Learn Procedure
After the vehicle is completed, write the model and serial number (see location for serial number tag – front of LH cylinder head) in the area indicated
on the coupon, located on the last page and take the coupon and vehicle to your GM Dealer to have CASE learn performed.
Install the Emission Label
Install the Emission Certification Label in a visible location on the hood or on the dash.
LT4 E-ROD Instruction Sheet
PART No.
REV 04DE19
19370613
SHEET
21 of 83
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