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[Small Dealer]

Originally Posted by GXPsy Rose You can search the forum for it as it is on here. Believe "Small Dealer" posted it.

Was another site member, krisis7, that posted it (and you borrowed for another thread) shortly after it came out back in May.
Released 5-1-08- Brake update on Redlines/GXP

The original version had the calibration release only for Automatics, the "A" version changed some wording and the "B" version added the manual transmission calibration release.

Here is a cleaner copy of the TSB and a PDF of the June 26th target mail date letter (generic sample):

#07-05-25-007B: Pedal Noise/Buzz, Extra Effort Needed to Depress Brake Pedal After Vehicle Has Not Been Driven For Extended Period of Time (Reprogram ECM and ECM) - (May 16, 2008) Models: 2008 Pontiac Solstice GXP 2008 Saturn SKY Redline 2008 Daewoo G2X Built Prior to the Breakpoints Listed Below -------------------------------------------------------------------------------- This bulletin is being revised to announce that the calibrations are available for vehicles equipped with manual transmissions. Please discard Corporate Bulletin Number 07-05-25-007A (Section 05 -- Brakes). -------------------------------------------------------------------------------- Model-VIN Breakpoint Saturn-8Y129355 Pontiac-8Y129363 Daewoo-All Vehicles Please make a copy of this bulletin and give it to your customer for future reference. System Description The 2008 Pontiac Solstice GXP, Saturn SKY Redline, and Daewoo G2X are performance vehicles that come equipped with the 2.0L (RPO LNF) engine and an advanced performance braking system called Optimized Hydraulic Boost (OHB). The OHB brake system utilizes the Anti-Lock Brake System (ABS) to assist vehicle braking in low brake vacuum conditions. The brake systems on these vehicles use engine vacuum to assist the power brake system during most brake applications. The OHB system supplements the power assist brake system when there is low engine vacuum, such as when the engine is initially started after an extended period of no operation or while operating in high altitude. Condition Some customers may comment on one or more of the following brake system characteristics: • Increased brake pedal effort due to low brake booster vacuum conditions that may occur after the vehicle has not been operated for an extended period of time and/or at higher altitudes and restarted. • Brake pedal movement or pulsation accompanied by a ratchet sound coming from the brake system during OHB activation when braking. Correction Reprogram the ECM with an updated engine calibration. This new service calibration will increase engine vacuum when the vehicle is initially started. Reprogram the EBCM with an updated brake calibration. This programming event will return the module to its original state if it was previously updated for this condition. These calibrations will be available as an EBCM/ECM programming sequence event. From the controller list, select "EBCM/ECM Sequential Program." Important: • After the EBCM/ECM calibration, brake pedal movement or pulsation accompanied by a ratchet sound will be reduced. • Allowing the engine to idle for a period of time after the engine is started will help increase the vacuum for the power assist brake system. • If the SVC BRAKE SYSTEM message is displayed on the DIC. The brake system must be inspected for any faults in the system. Refer to the Owner Manual (page 4-4 for the Pontiac Solstice or Saturn SKY) for additional information on this brake system operation. GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

The recalibration is covered under the New Vehicle Limited Warranty for 36 months or 36,000 miles, which ever comes first.





The NHTSA has closed their Preliminary Investigation into the 2008 Solstice GXP and 2008 Saturn Sky Redline and the OHB System. So it appears no further investigation or no escalation to a recall request will be forthcoming.

Originally Posted by NHTSA A SAFETY-RELATED DEFECT HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED. ACCORDINGLY, THIS INVESTIGATION IS CLOSED.