| “This site contains affiliate links for which OEMDTC may be compensated” |
NHTSA ID Number: 10111705
Manufacturer Communication Number: PIP4912E
Summary
This Preliminary Information communication provides information to the technician on vehicles that may have an intermittent high idle. If a technician has duplicated, or the customer description aligns with the speeds mentioned in the idle speed description tables, the idle speed should be considered a normal characteristic of current vehicle design.
39 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CHEVROLET | EXPRESS | 2010-2017 |
| CHEVROLET | SILVERADO | 2017 |
| CHEVROLET | SILVERADO 1500 | 2011, 2014 |
| CHEVROLET | SILVERADO 2500 | 2011-2016 |
| CHEVROLET | SILVERADO 3500 | 2013 |
| GMC | SAVANA | 2010-2017 |
| GMC | SIERRA | 2017 |
| GMC | SIERRA 1500 | 2014 |
| GMC | SIERRA 2500 | 2011-2016 |
| GMC | SIERRA DENALI | 2011-2013, 2015-2016 |
SEOCONTENT-START
Bulletin No.: PIP4912D
Date: Feb-2016
| Subject: | Duramax Intermittent High Idle Or Elevated Idle Descriptions |
| Models: | 2010 – 2016 Chevrolet Express, Silverado |
| 2010 – 2016 GMC Savana, Sierra | |
| Equipped with the 6.6 Duramax Diesel Engine RPO codes L5P, LGH and LML |
This PI was superseded to update Model Years. Please discard PIP4912C.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
A dealer may encounter a customer concern of an intermittent high idle. High idles may be commanded by the ECM for certain battery charging electrical loads or diesel particulate filter (DPF) cleaning processes.
These idle up speeds may occur with no input from the customer. Idle speed descriptions are included below.
G-VAN / GMT610 LGH IDLE SPEEDS
| REASON | RPM | Conditions/Constraints | Enablement | Trans Gear |
| BASE IDLE | 680 | Warm engine | P,N,D | |
| 680-850 | Base engine curve -Varies with coolant 680-850 temps from -40C to 150C | P,N,D | ||
| Manual elevated idle (UF3) | 1200 (default) | 680 -1300 RPM selectable via Tech2 | Set parking brake, cruise ON. cruise SET | P,N |
| Cold temp warm-up (EPR) | 680-1200 | RPM level varies with coolant temp disabled once coolant temp reaches 68C delayed for extremely low coolant temps | Enabled by selection through DIC | P, N |
| DPF Regen | 800 | During Regen and post-regen cooldown, & HC clean-out | ||
| AIC | N/A | AlC idle speed request disabled by platform for 2011 | ||
| Low battery voltage | 725 | Assist battery charging | Level 1 Based on Platform BCM module request | P,N |
| 850 | Further assist battery charging | Level 2 Based on Platform BCM module request | P,N | |
| 850 | Further assist battery charging | Level 3 Based on platform BCM module request | P,N |
C/K Truck / GMT900 / K2XX L5P and LML IDLE SPEEDS
| REASON | RPM | Conditions/Constraints | Enablement | Trans Gear |
| BASE IDLE | 640 | Warm engine | P,N,D | |
| 640-850 | Base engine curve -Varies with coolant temps from -40C to 150C | P,N,D | ||
| Manual elevated idle (UF3) | 1200 (default) | 680 -1300 RPM selectable via Tech2 | Set parking brake, cruise ON, cruise SET | P,N |
| Cold temp warm-up (EPR) | 640-1050 | RPM level varies with coolant temp disabled once coolant temp reaches 68C delayed for extremely low coolant temps | Enabled by selection through DIC | P,N |
| DPF Regen | 800 | During Regen and post-regen cooldown, & HC clean-out | Auto | P,N,D |
| AIC | N/A | AlC idle speed request disabled by platform for 2011 | None | P,N |
| Low battery voltage | 750 | Assist battery charging | Level 1 Based on Platform BCM module request | P,N |
| 900 | Further assist battery charging | Level 2 Based on Platform BCM module request | P,N | |
| 1050 | Further assist battery charging | Level 3 Based on Platform BCM module request | P,N |
C/K Truck / GMT900 / K2XX LGH IDLE SPEEDS
| REASON | RPM | Conditions/Constraints | Enablement | Trans Gear |
| BASE IDLE | 600 | Warm engine | P,N,D | |
| 600-850 | Base engine curve -Varies with coolant temps from -40C to 150C | P,N,D | ||
| Manual elevated idle (UF3) | 1200 (default) | 680 -1300 RPM selectable via Tech2 | Set parking brake, cruise ON, cruise SET | P,N |
| Cold temp warm-up (EPR) | 600-1050 | RPM level varies with coolant temp disabled once coolant temp reaches 68C delayed for extremely low coolant temps | Enabled by selection through DIC | P,N |
| DPF Regen | 800 | During Regen and post-regen cool-down, & HC clean-out | Auto | P,N,D |
| AlC | NlA | AlC idle speed request disabled by platform for 2011 | None | P,N |
| Low battery voltage | 750 | Assist battery charging | P,N | |
| 900 | Further assist battery charging | P,N | ||
| 1050 | Further assist battery charging | P,N |
Recommendation/Instructions
If a dealer has duplicated, or the customer description aligns with the speeds mentioned in the idle speed description tables, the idle speed should be considered a normal characteristic of current vehicle design.
Do not attempt repairs for intermittent high idle as described in this PI.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
SEOCONTENT-END
Bulletin No.: PIP4912E
Date: Dec-2016
https://www.nhtsa.gov/recalls?nhtsaId=10111705
https://static.nhtsa.gov/odi/tsbs/2016/MC-10111705-9999.pdf
To View or Download this Document Click Here
Bulletin No.: PIP4912D
Date: Feb-2016
https://www.nhtsa.gov/recalls?nhtsaId=10095683
https://static.nhtsa.gov/odi/tsbs/2016/SB-10095683-2280.pdf
To View or Download this Document Click Here
Bulletin No.: PIP4912C
Date: Aug-2014
https://www.nhtsa.gov/recalls?nhtsaId=10112167
https://static.nhtsa.gov/odi/tsbs/2014/MC-10112167-9999.pdf
To View or Download this Document Click Here
Bulletin No.: PIP4912B
Date: Nov-2013
https://www.nhtsa.gov/recalls?nhtsaId=10112339
https://static.nhtsa.gov/odi/tsbs/2013/MC-10112339-9999.pdf
To View or Download this Document Click Here
| “This site contains affiliate links for which OEMDTC may be compensated” |
SaleBestseller No. 1
Hot Shot's Secret Everyday Diesel Treatment 16 Ounce Squeeze Bottle (HSSEDT16ZS)
- Take Care Of Your Engine With An Every-Tank Solution For Better Performance And Health
- Boosts Cetane Up To 7 Points For Better Fuel Economy And Maintenance
- Adds Lubricity To Protect Fuel System Including Pump And Injectors
- Prevents Rust And Corrosion, Disperses Moisture And Adds Stability To Fuel
Bestseller No. 2
Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles
- 40.6 oz bottle treats 400 gallons - Use at every fill-up
- Formulated to address issues with modern diesel fuels
- Incorporates Archoil's proven combustion modifier technology and a strong cetane boost to increase power and response
- Cleans, lubricates and protects your fuel system (including HPCR systems)
- Increases fuel economy (MPG)
SaleBestseller No. 3
Hot Shot's Secret Diesel Extreme, 1 Qt (Packaging May Vary) (P040432Z) Amber, 32 Fluid Ounce
- Cleans Fuel System – Deeply cleans any diesel engine’s fuel system including injectors, cylinders, fuel lines, tank, and tank in one fuel treatment lasting up to 6,000 miles
- Cleans Fuel Injectors – Safely removes and prevents Internal Diesel Injector Deposits (IDIDs), External Diesel Injector Deposits (EDID’s) and other forms of varnish and deposits
- Boosts Cetane – Increases cetane by up to 7 points after the fuel system is fully cleaned, for an even more effective boost in combustion, fuel economy, and engine power while reducing DPF regens
- Increases Mileage – Maximizes your MPG's and helps you save at the pump by improving engine performance and fuel combustion, so you can get the most out of your diesel fuel
- Stabilizes and Prevents Rust, Disperses Moisture – Keeps diesel “healthy” using a military grade non-alcohol-based water dispersant plus rust and corrosion inhibitors
Bestseller No. 4
Power Service Diesel Kleen + Centane Boost 64oz Bottle (6 Pack)
- Cleans dirty injectors and prevents injector sticking in both High Pressure Common Rail (HPCR) and older systems
- Boosts cetane up to 6 numbers – engines run smoother with less power lag and faster cold starts
- Effective in all diesel fuels, including ULSD, biodiesel and biodiesel blends
- Fit type: Universal
- Part number: 3064-06
Bestseller No. 5
Performance Formula One Shot 8oz, Case of 24 Bottles Treats 30 gallons Diesel Fuel per Bottle
- Restores/Increase Horsepower: detergents clean deposits in the injection system
- Reduces Fuel Consumption tests show an average of 4 percent improvement in MPG and gains up to 9.6 Percent
- Cetane Improver improves combustion resulting in better engine starting, running and reduced noise
- Reduces Wear: Lubricity improvers restore lubricity to ultra low sulfur diesel fuels
- Reduces Emissions reduces Smoke and Particulates
SaleBestseller No. 6
4 Bottles of Stanadyne 38564 Performance Formula 8 oz Diesel Fuel Additive
- Restores/Increase Horsepower: detergents clean deposits in the injection system
- Reduces Fuel Consumption tests show an average of 4 percent improvement in MPG and gains up to 9.6 Percent
- Cetane Improver improves combustion resulting in better engine starting, running and reduced noise
- Reduces Wear: Lubricity improvers restore lubricity to ultra low sulfur diesel fuels
- Reduces Emissions reduces Smoke and Particulates
Bestseller No. 7
Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40.6 oz) + AR6400-D Diesel Fuel System Cleaner
- Includes AR6500 Diesel Treatment (40 oz)
- Includes AR6400-D Diesel Fuel System Cleaner
- Restore key fuel system components - injectors, turbo & dpf
- Boost cetane, improve performance and MPG
- AR6400-D is not the remedy for HEUI injector stiction. Please use AR9100 Friction Modifier instead
Bestseller No. 8
STA-BIL Diesel Fuel Stabilizer And Performance Improver - Keeps Diesel Fuel Fresh For Up To 12 Months - Lubricates And Cleans The Fuel System - Treats 320 Gallons, 32 fl. oz. (22254)
- Advanced Sludge and Sediment Prevention: Unleash the power of our diesel fuel additive, designed to act as a formidable shield against sludge and sediment formation. It actively prevents the accumulation of harmful deposits in your fuel system, ensuring a cleaner and more efficient engine performance.
- Comprehensive Fuel System Care: Our diesel fuel additive not only prevents sludge and sediment but also cleans and lubricates your entire fuel system. From fuel injectors, pumps, and tanks this additive is a thorough caretaker, enhancing the longevity and efficiency of your engine.
- Specially Formulated STA-BILizers: Our formulation includes specially crafted STA-BILizers that provide an extra layer of protection against corrosion. These additives are tailored to combat the elements that can compromise the integrity of your diesel fuel, ensuring durability and long-lasting performance.
- Oxidation Reduction for Optimal Fuel Stability: Say goodbye to fuel oxidation issues caused by thermal breakdown. Our diesel fuel additive actively reduces oxidation, contributing to enhanced fuel stability. This not only preserves the quality of your diesel but also maintains optimal combustion conditions for improved engine efficiency
- Water Elimination Technology: This additive doesn't just stop at fuel quality; it actively removes water, safeguarding your engine from the detrimental effects of water contamination. By eliminating water from the fuel system, our additive ensures that your engine operates in a clean and moisture-free environment, promoting consistent and reliable performance.
Bestseller No. 9
Power Service Diesel Kleen+Cetane Boost 12 oz., Pack of 9
- Cleans dirty injectors and prevents injector sticking in both High Pressure Common Rail (HPCR) and older systems
- Removes both internal and external deposits on fuel injectors
- Restores lost power and fuel economy
- Contains Slickdiesel Lubricator to protect fuel pumps and injectors from increased wear caused by poor quality Ultra Low Sulfur Diesel (ULSD) fuel
- Effective in all diesel fuels, including ULSD, biodiesel and biodiesel blends
Bestseller No. 10
Lucas Oil 10013 Fuel Treatment - 1 Gallon
- Cleans and Lubricates Fuel System: The product contains a blend of detergents and additives that help to clean and lubricate the fuel system, including the fuel injectors, carburetor, and combustion chamber.
- Improves Fuel Economy: The product can help to improve fuel economy by removing deposits and contaminants from the fuel system and improving the efficiency of fuel combustion.
- Reduces Emissions: By improving fuel combustion, the product can also help to reduce exhaust emissions, including harmful pollutants such as carbon monoxide and nitrogen oxides.
- Increases Power and Acceleration: The product can also help to increase power and acceleration by improving the flow of fuel through the system and reducing the buildup of deposits that can impede engine performance.
- Neutralizes Low Sulfur Fuel Problems: Lucas Oil 10013 Fuel Treatment contains a blend of detergents and additives that help to neutralize sulfur and other harmful contaminants that may be present in the fuel system. The detergents work to clean the fuel injectors and carburetor, which can become clogged with sulfur deposits over time.
Last update on 2024-04-10 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.