TSB's: Engine

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sperry:
These are not sorted by number, as they were posted as needed and are out of sequence to do that.

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03 Reduced Engine Power - DTCs P0120 , P0220 , P1516 and/or P1518 - 03 Model Year Full Size Trucks and Utilities with 4.8 , 5.3 or 6.0 Engines - kw CEL light low LQ4 LQ9 LR4 MIL reducedpwrmde #PIP3042A - (Aug 30, 2004)

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Condition/Concern:

Service Engine Soon Light and / or Reduced Engine Power Mode due to any of the following DTCs: P0120, P0220, P1516 and/or P1518.

Recommendation/Instructions:

If the SI diagnosis and bulletin 03-06-04-032 did not isolate a concern, the following information may help:

   1.  Inspect the Yellow TAC Motor Control Circuit (581) about 1 inch to 4 inches from the throttle body connector to see if it is broken inside of the insulation.
   2. Inspect S102 if there is a P1518 stored. S102 is in the engine harness and is 5.5 inches from the MAP Sensor.
   3. Install that latest engine diagnostic calibrations in the PCM. Some 2003 model year vehicles have updated engine diagnostic calibrations available to address DTCs P0120, P0220, P1516 and or P1518. The title of the updated engine diagnostic calibration in TIS2000 is "New calibration to eliminate setting of P0120, P0220, or P1516 with the engine not running. Includes diagnostic enhancements for P1518."

If the above did not help, replace the throttle body and retorque it to 45 lb/in on the 1st pass and 89 lb/in on the second and final pass.

Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

Models:

(03 Cadillac Escalade) and (03 Chevrolet Avalanche) and (03 Chevrolet Silverado)and (03 Chevrolet Suburban) and (03 Chevrolet Tahoe) and (03 GMC Sierra) and (03 GMC Yukon) and (03 Hummer H2)

sperry:
SES Light and Reduced Engine Power with a DTC P1516: DTCs P0120 , P0220 , P1514 , P1515 , P1518 and P2135 May Be Present; 04 Trucks and Utilities with GENIII V-8 Engines - kw 4.8 5.3 6.0 #PIP3089 - (Jul 30, 2004)

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Condition/Concern:

SES light and reduced engine power with a DTC P1516. DTCS P0120, P0220, P1514, P1515, P1518 and P2135 may also be present.

Recommendation/Instructions:

If the SI diagnostics do not isolate the cause, inspect the Yellow TAC Motor Control Circuit (581) about 1 inch to 4 inches from the throttle body connector to see if it is broken inside of the insulation. Repair as necessary.

Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

Models:

(03 - 04 Cadillac Escalade C1, C6, K1, K6) and (03 - 04 Chevrolet Avalanche C1, K1, C2, K2) and (03 - 04 Chevrolet Silverado Truck C1, K1, C2, K2, C3, K3 ) and (03 - 04 Chevrolet Tahoe C1, K1 ) and (03 - 04 Chevrolet Suburban C1, K1, C2, K2, C3, K3 ) and (03 - 04 GMC Sierra Truck C1, K1, C2, K2, C3, K3 ) and (03 - 04 GMC Yukon C1, K1 ) and (03 - 04 GMC Yukon XL C1, K1, C2, K2, C3, K3) and (03 - 04 Hummer H2 N2 ) and (03 - 04 Buick Rainier S1, T1 ) and (03 - 04 Chevrolet Trail Blazer EXT S1, T1 ) and (03 - 04 GMC Envoy XL XUV S1, T1)

sperry:
03 8.1 L18 Reduced Engine Power Due to DTCs P0120 , P0220 , P1516 and / or P1518 - kw CEL GMT800 GMT805 GMT830 light low MIL reduced reducedpwrmde #PIP3040 - (Jun 30, 2004)
03 8.1 L18 Reduced Engine Power Due to DTCs P0120 P0220 P1516 and / or P1518

The following diagnosis might be helpful if the vehicle exhibits the described symptoms in the PI.

Condition/Concern:

Service Engine Soon Light and / or Reduced Engine Power Mode due to any of the following DTCs: P0120, P0220, P1516 and/or P1518. This condition is normally very intermittent.

Recommendation/Instructions:

If the published diagnostics did not isolate a concern, the following information may help:

   1. Inspect G104 on the rear of the left cylinder head. See SI document 818627, if necessary.
   2. Install that latest engine diagnostic calibrations in the PCM. Some 2003 model year vehicles have updated engine diagnostic calibrations available to address DTCs P0120, P0220, P1516 and or P1518. The title of the updated engine diagnostic calibration in TIS2000 is "New calibration to eliminate setting of P0120, P0220, or P1516 with the engine not running. Includes diagnostic enhancements for P1518."

Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

Models:

(03 Chevrolet Avalanche C2, K2) and (03 Chevrolet Silverado C2, C3, K2, K3) and (03 Chevrolet Suburban C2, C3, K2, K3) and (03 GMC Sierra C2, C3, K2, K3) and (03 GMC Yukon XL C2, C3, K2, K3)

sperry:
Info - Automatic Transmission Shift, Engine Driveability Concerns or Service Engine Soon (SES) Light On as a Result of the Use of an Excessively/Over-Oiled Aftermarket, Reusable Air Filter #04-07-30-013A - (Jan 25, 2005)

2005 and Prior GM Cars and Light Duty Trucks

2005 and Prior Saturn Models

2003-2005 HUMMER H2

This bulletin is being revised to add additional model years and to clarify warranty coverage. Please discard Corporate Bulletin Number 04-07-30-013 (Section 07 -- Transmission/Transaxle).



The use of an excessively/over-oiled aftermarket, reusable air filter may result in:

       Service Engine Soon (SES) Light On
       Transmission shift concerns, slipping and damaged clutch(es) or band(s)
       Engine driveability concerns, poor acceleration from a stop, limited engine RPM range

The oil that is used on these air filter elements may be transferred onto the Mass Air Flow (MAF) sensor causing contamination of the sensor. As a result, the Grams per Second (GPS) signal from the MAF may be low and any or all of the concerns listed above may occur.

When servicing a vehicle with any of these concerns, be sure to check for the presence of an aftermarket reusable, excessively/over- oiled air filter. The MAF, GPS reading should be compared to a like vehicle with an OEM air box and filter under the same driving conditions to verify the concern.

The use of an aftermarket reusable air filter DOES NOT void the vehicle's warranty.

If an aftermarket reusable air filter is used, technicians should inspect the MAF sensor element and the air induction hose for contamination of oil prior to making warranty repairs.

Transmission or engine driveability concerns (related to the MAF sensor being contaminated with oil) that are the result of the use of an aftermarket reusable, excessively/over-oiled air filter are not considered to be warrantable repair items.

sperry:
Info - Top Tier Detergent Gasoline (Deposits, Fuel Economy, No Start, Power Performance, Stall Concerns) #04-06-04-047C - (Dec 14, 2004)

2005 and Prior All General Motors Passenger Cars and Trucks (U.S. Only)

2005 and All Prior Saturn Vehicles

2003-2005 HUMMER H2

This bulletin is being revised to include additional gasoline brands that currently meet the Top Tier Detergent Gasoline Standards and add Saturn to the Models section. Please discard Corporate Bulletin Number 04-06-04-047B (Section 06 - Engine/Propulsion System).

A new class of gasoline, called Top Tier Detergent Gasoline, is appearing at retail stations of some fuel marketers. This gasoline meets detergency standards developed by four automotive companies. A description of the concept and benefits of Top Tier is provided in the following question and answer section.

Gasoline Brands That Currently Meet Top Tier Detergent Gasoline Standards

As of December 8, 2004, the following gasoline brands meet the Top Tier Detergent Gasoline Standards:
       Chevron Chevron has markets in 29 states in the West, Southwest and South, as well as in Alaska and Hawaii. ALL grades of Chevron with Techron gasoline meet Top Tier Detergent Gasoline Standards.
       QuikTrip (not to be confused with Kwik Trip) QuikTrip operates convenience stores and travel centers in a number of metropolitan areas:
      -    Tulsa, OK
      -    Springfield, MO
      -    Kansas City, MO and Kansas City, KS
      -    Wichita, KS
      -    Des Moines, IA
      -    Omaha, NE
      -    St. Louis, MO and St. Louis, IL
      -    Atlanta, GA
      -    Dallas-Ft. Worth, TX
      -    Phoenix, AZ
      -    Bartlesville, OK
      -    Miami, OK
      -    Vinita, OK
      -    Columbia, MO
       Conoco has over 4,000 stations located in 33 states.
       Phillips 66 has locations in 32 states across the nation.
       76 has over 2,700 stations located throughout the country.
       Shell Shell Oil Products has a network of nearly 7,000 branded gasoline stations in the Western United States. Shell Oil Company markets branded products through more than 10,000 stations in the Eastern and Southern United States.
       Entec Stations offer gasoline through stations located in the greater Montgomery, Alabama area.

What is Top Tier Detergent Gasoline?

Top Tier Detergent Gasoline is a new class of gasoline with enhanced detergency. It meets new, voluntary deposit control standards developed by four automotive companies that exceed the detergent requirements imposed by the EPA.

Where Can Top Tier Detergent Gasoline Be Purchased?

The Top Tier program began on May 3, 2004. Some fuel marketers have already joined and have introduced Top Tier Detergent Gasoline. This is a voluntary program and not all fuel marketers will offer this product. Once fuel marketers make public announcements, they will appear on a list of brands that meet the Top Tier standards.

Who developed Top Tier Detergent Gasoline standards?

Top Tier Detergent Gasoline standards were developed by four automotive companies: BMW, General Motors, Honda and Toyota.

Why was Top Tier Detergent Gasoline developed?

Top Tier Detergent Gasoline was developed to increase the level of detergent additive in gasoline. The EPA requires that all gasoline sold in the U.S. contain a detergent additive. However, the requirement is minimal and in many cases, is not sufficient to keep engines clean. In order to meet Top Tier Detergent Gasoline standards, a higher level of detergent is needed than what is required by the EPA. Also, Top Tier was developed to give fuel marketers the opportunity to differentiate their product.

Why did the four automotive companies join together to develop Top Tier?

All four corporations recognized the benefits to both the vehicle and the consumer. Also, joining together emphasized that low detergency is an issue of concern to several automotive companies.

What are the benefits of Top Tier Detergent Gasoline?

Top Tier Detergent Gasoline will help keep engines cleaner than gasoline containing the "Lowest Additive Concentration" set by the EPA. Clean engines help provide optimal fuel economy and performance and reduced emissions. Also, use of Top Tier Detergent Gasoline will help reduce deposit related concerns.

Who should use Top Tier Detergent Gasoline?

All vehicles will benefit from using Top Tier Detergent Gasoline over gasoline containing the "Lowest Additive Concentration" set by the EPA. Those vehicles that have experienced deposit related concerns may especially benefit from use of Top Tier Detergent Gasoline.

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