1998 GMC Sierra 1500 Engine cooling Problems
- Complaints
- 3about this part
- Share
- 5%of 59 total for the year
- Median mileage
- 125,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 1998 GMC Sierra 1500, 5% of the 59 complaints for this model year. Where a mileage was given, the median is 125,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Had a antifreeze leak for months. Started looking around and noticed the fitting from the heater core return line into the engine block was corroded and ready to fall of. I barely touched the return line and it the fitting snapped off. I'm the 3rd person I know with this same problem, same vehicle. There is obviously a problem here GM needs to address.”
NHTSA complaint #10241820, filed 2008-09, 163,000 miles“Gm has admitted it has faulty seals on the coolent system and has claimed dex cool is fine but the radiator caps are faulty as they corode. If the dex cool corodes the caps will it not follow it may corode other parts of the system? And if GM has admitted installing faulty seals why won't they at least recall this part and fix it instead of making the consumer fix it for them. I have been experiancing cooling system problems and wish the company would at least fix the problems they admit to. I do not want to go to the garage one day and find all the coolant on the floor.”
NHTSA complaint #10056514, filed 2004-02, 125,000 milesRelated service bulletins
- 10246631Sep 1, 2013Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 3 | 2% |
| 2024 | 31 | 8% |
| 2023 | 23 | 5% |
| 2022 | 29 | 5% |
| 2021 | 49 | 8% |
| 2020 | 21 | 4% |
| 2019 | 26 | 4% |
| 2018 | 6 | 2% |
| 2017 | 2 | 1% |
| 2016 | 3 | 1% |
| 2015 | 1 | 0% |
| 2014 | 5 | 1% |
| 2012 | 1 | 1% |
| 2011 | 2 | 1% |
| 2010 | 4 | 2% |
| 2009 | 4 | 2% |
| 2008 | 1 | 0% |
| 2007 | 7 | 3% |
| 2006 | 3 | 2% |
| 2005 | 8 | 5% |
| 2004 | 8 | 4% |
| 2003 | 3 | 2% |
| 2002 | 2 | 1% |
| 2001 | 3 | 2% |
| 2000 | 5 | 3% |
| 1999 | 6 | 4% |
| 1998 | 3 | 5% |
| 1997 | 1 | 1% |
| 1996 | 1 | 20% |
Other parts of the 1998 GMC Sierra 1500
18 complaintsVisibility (wipers, defrost, mirrors)
11 complaintsTransmission and drivetrain
7 complaintsSteering
6 complaintsAir bags
4 complaintsFuel system
4 complaintsBody and structure
4 complaintsElectrical system
3 complaintsExterior lighting
1 complaintsLatches, locks and linkages
1 complaintsSeat belts
1 complaintsSeats
1 complaints
← All problems reported for the 1998 GMC Sierra 1500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology