GMC Yukon 2000–2006
Common on this vehicle:Misfire or rough idleDoes not startStalls or shuts off
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2 records state a cause or a remedy. Each record is shown as short labels in the order fault → finding the cause → correction. Press a label to narrow to the records that state it.
Component named as the cause
A ribbon is as wide as the records that state both of its ends (only the commonest are drawn). A record that names several symptoms or components runs through each. Orange is records that say the fault came back or was not fixed. Results come from owners’ reports only; one that does not say is “result not stated”. None of this is a likelihood of a cause or a rate at which work succeeds.
Read the records one by one (2)
Known issuesIntermittent stall, misfire or crank no start (Ignition 1 feed wire broken near C148/C149)2
Manufacturer communication2005–2006 GMC YUKON ・ 2006-10-01
Intermittent stall, misfire or crank no start: Ignition 1 feed wire broken near C148/C149
1Fault
- The engine may intermittently stall, misfire, or crank without starting, and there may be no trouble codes set.
2Finding the cause
Possible causes
- The pink Ignition 1 power feed wire may break inside the insulation near connector C148/C149.
Steps to confirm (in the document’s order)
- Complete the SI diagnostics first; if they are inconclusive and the concern can be duplicated, inspect for a loss of Ignition 1 voltage to the ignition coils.
- Wiggle test the ignition coil harnesses to see if the concern can be duplicated.
- Inspect splices S160 and S159 for loose connections, and connectors C148 and C149 for wires breaking near the connector.
3Correction
What the documents say to do
Intermittent stall, misfire or crank no start (Ignition 1 feed wire broken near C148/C149)Confirm
- Complete the SI diagnostics first; if they are inconclusive and the concern can be duplicated, inspect for a loss of Ignition 1 voltage to the ignition coils.
Read the sentences of the record
From the manufacturer’s document
- Applies to：The information applies to 2005-06 Chevrolet Express, Silverado, Suburban, Tahoe, GMC Savana, Sierra and Yukon equipped with a 4.8, 5.3 or 6.0 engine.
- Condition：The engine may intermittently stall, misfire, or crank without starting, and there may be no trouble codes set.
- Confirm：Complete the SI diagnostics first; if they are inconclusive and the concern can be duplicated, inspect for a loss of Ignition 1 voltage to the ignition coils.
- Confirm：Wiggle test the ignition coil harnesses to see if the concern can be duplicated.
- Confirm：Inspect splices S160 and S159 for loose connections, and connectors C148 and C149 for wires breaking near the connector.
- Cause：The pink Ignition 1 power feed wire may break inside the insulation near connector C148/C149.
Open this issue of GM TechLink ↗ The points above are read from an article of TechLink, GM’s monthly publication for dealership technicians. The article itself is not reproduced here.
- Remedy
- Broken Ignition Wire This information applies to the 2005-06 Chevrolet Express, Silverado, Suburban, Tahoe, GMC Savana, Sierra, Yukon equipped with a 4.8, 5.3 or 6.0 engine. The engine may intermittently stall, misfire, or crank without starting. There may be no trouble codes set. Complete the SI diagnostics for any symptoms or trouble codes found. If diagnostics are inconclusive, and an intermittent stall, misfire, or a crank no start can be duplicated, inspect for a loss of Ignition 1 voltage to the ignition coils. Wiggle test the ignition coil harnesses to see if the concern can be duplicated. Inspect splices S160 and S159 for loose connections. Also inspect connectors C148 and C149 for wires breaking near the connector. The pink Ignition 1 power feed wire may break inside the insulation near connector C148/C149.
Manufacturer communication2005–2006 GMC YUKON ・ 2006-09-28
Loss of Ignition 1 Voltage to the Ignition Coils
1Fault
2Finding the cause
3Correction
What the documents say to do
Intermittent stall, misfire or crank no start (Ignition 1 feed wire broken near C148/C149)Confirm
- Complete the SI diagnostics first; if they are inconclusive and the concern can be duplicated, inspect for a loss of Ignition 1 voltage to the ignition coils.
Read the sentences of the record
- Remedy
- LOSS OF IGNITION 1 VOLTAGE TO THE IGNITION COILS. CONSUMER EXPERIENCED INTERMITTENT STALL, MISFIRE, OR CRANK NO START. THERE MAY BE NO TROUBLE CODES SET. *KB UPDATED 3/17/09. *PE