Source reference 2003-10-91

Manufacturer communication — 2003 GMC 2003 C/K TRUCKS WITH THE 5.3L ENGINE (VIN Z -- RPO L59), AND 2004 C/K TRUCKS WITH ANY ENGINE (YUKON)

Reporter type: Manufacturer

Vehicles as recorded

2003 GMC 2003 C/K TRUCKS WITH THE 5.3L ENGINE (VIN Z -- RPO L59), AND 2004 C/K TRUCKS WITH ANY ENGINE (YUKON XL) This vehicle's overview →
2004 GMC 2003 C/K TRUCKS WITH THE 5.3L ENGINE (VIN Z -- RPO L59), AND 2004 C/K TRUCKS WITH ANY ENGINE (YUKON XL) This vehicle's overview →
2003 GMC 2003 C/K TRUCKS WITH THE 5.3L ENGINE (VIN Z -- RPO L59), AND 2004 C/K TRUCKS WITH ANY ENGINE (YUKON) This vehicle's overview →
2004 GMC 2003 C/K TRUCKS WITH THE 5.3L ENGINE (VIN Z -- RPO L59), AND 2004 C/K TRUCKS WITH ANY ENGINE (YUKON) This vehicle's overview →

What the manufacturer’s document says

03-06-03-001 ・ normal characteristic (no repair) ・ No vehicle named (written by engine)

Applies to

Applies to 2003 C/K trucks with the 5.3L Engine (VIN Z; RPO L59), and 2004 C/K trucks with any engine (as the article words it).
the passage
Owners of 2003 C/K trucks with the 5.3L Engine (VIN Z -- RPO L59), and 2004 C/K trucks with any engine, may comment that the engine starter continues to run after the key is released (ghost crank).

Fault

Owners may comment that the engine starter continues to run after the key is released (ghost crank).
the passage
Owners of 2003 C/K trucks with the 5.3L Engine (VIN Z -- RPO L59), and 2004 C/K trucks with any engine, may comment that the engine starter continues to run after the key is released (ghost crank).

Finding the cause

Possible causes

On these vehicles, the starter relay is controlled by the PCM, with input from the key switch.
the passage
On these vehicles, the starter relay is controlled by the PCM, with input from the key switch.
After 0.4 seconds of cranking, a timer is activated in the PCM. Once this happens, even though the key is released, the PCM will continue to crank the starter until the engine starts or a no-start time limit is reached.
the passage
After 0.4 seconds of cranking, a timer is activated in the PCM. Once this happens, even though the key is released, the PCM will continue to crank the starter until the engine starts or a no-start time limit is reached.
The fuel pump module may take several seconds to build fuel pressure, particularly after sitting overnight.
the passage
The fuel pump module may take several seconds to build fuel pressure, particularly after sitting overnight.
The automatic crank feature ensures sufficient crank time even if the customer releases the ignition switch prematurely.
the passage
The automatic crank feature ensures sufficient crank time even if the customer releases the ignition switch prematurely.

Correction

Caution

This is a normal condition and no repairs should be attempted for this condition.
the passage
This is a normal condition and no repairs should be attempted for this condition.

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

Communication summary
Japanese translation not processed yet.
Starter Cranks After Key is Released -- Reminder Owners of 2003 C/K trucks with the 5.3L Engine (VIN Z -- RPO L59), and 2004 C/K trucks with any engine, may comment that the engine starter continues to run after the key is released (ghost crank). Owners of 2003 C/K trucks with the 5.3L Engine (VIN Z -- RPO L59), and 2004 C/K trucks with any engine, may comment that the engine starter continues to run after the key is released (ghost crank). This is a normal condition and no repairs should be attempted for this condition. On these vehicles, the starter relay is controlled by the PCM, with input from the key switch. After 0.4 seconds of cranking, a timer is activated in the PCM. Once this happens, even though the key is released, the PCM will continue to crank the starter until the engine starts or a no-start time limit is reached. The fuel pump module may take several seconds to build fuel pressure, particularly after sitting overnight. The automatic crank feature ensures sufficient crank time even if the customer releases the ignition switch prematurely.
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Source

Source: GM TechLink
Source reference: 2003-10-91
Received by source: 2003-10-01
Incident date: Unknown

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