P0299 on GMC vehicles The turbocharger or supercharger is not making the boost the computer asked for

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Bulletins and campaigns GMC filed with NHTSA whose summary names P0299. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• 18NA020 Service bulletin
  2019-02-19 · Engine And Engine Cooling
• This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• PIE0503 Service bulletin
  2019-02-04 · Engine And Engine Cooling
• This engineering informational bulletin is requesting information from the field on reduced engine power, DTC P0299 set.
• PIE0503A Service bulletin
  2019-02-20 · Engine And Engine Cooling
• This engineering information PI ends the need for information from the field on reduced engine power, DTC P0299 set.
• PIE0452 Service bulletin
  2018-02-19 · Equipment
• This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Charge Air Cooler Ice Blockage with Malfunction Indicator Lamp Illuminated and DTC P0299 Set After Completing Bulletin 18-NA-020
• PIE0452A Service bulletin
  2018-04-17 · Engine And Engine Cooling — Cooling System
• This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Charge Air Cooler Ice Blockage with Malfunction Indicator Lamp Illuminated and DTC P0299 Set After Completing Bulletin 18-NA-020
• 18NA020 Service bulletin
  2019-12-18 · Exterior Lighting
• This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• PIP5710 Service bulletin
  2020-02-11 · Engine
• This Preliminary information communicates the possiblilty of the charge air cooler tube becoming disconnected from the throttle body and causing reduced power with dtc P0172 P0299 P0101 P0506 P1101
• 18NA020 Service bulletin
  2020-02-21 · Equipment
• This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• PIP5651E Service bulletin
  2021-06-24 · Power Train
• This Preliminary information communicates the possibility of the charge air cooler pipe connection becoming disconnected from the throttle body causing a reduced power issue and one or more of the following trouble codes P0172, P0299, P0101, P0506, P1101.
• PIP5651F Service bulletin
  2021-08-19 · Power Train
• This Preliminary information communicates the possibility of the charge air cooler pipe connection becoming disconnected from the throttle body causing a reduced power issue and one or more of the following trouble codes P0172, P0299, P0101, P0506, P1101.
• PIP5812B Service bulletin
  2021-09-27 · Engine And Engine Cooling — Engine — Gasoline — Turbo/Supercharger
• This Preliminary information communicates the possibility of dtc p0299 p0234 setting due to oil/moisture cndensate freezing in Turbocharger Wastegate Regulator Solenoid Valve (TCV) during cold weather driving
• PIP5710A Service bulletin
  2020-08-27 · Engine And Engine Cooling
• This Preliminary information communicates the possiblilty of the charge air cooler tube becoming disconnected from the throttle body and causing reduced power with dtc P0172 P0299 P0101 P0506 P1101

A stored code names the test that failed, never the part that caused it. The record above is what GMC and its owners have filed about it; the code’s page across every make has the whole file.