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10.0

really awful
Crashes / Fires:
4 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
106,249 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

1999 GMC Sierra 1500 brakes problems

brakes problem

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1999 GMC Sierra 1500 Owner Comments (Page 1 of 2)

problem #37

Jul 202010

Sierra 1500 8-cyl

  • miles

A D V E R T I S E M E N T S

Upon leaving my driveway to the first intersection the brake pedal went all the way to the floorboard. I got the truck home and parked it. I thought the anti-lock part was probably the problem. Expensive as that part is I just let the truck sit. One day I left a piece of cardboard under the truck and isolated the leak to two rusted out lines at the plastic clip on the frame. This area must hold moisture and doesn't dry-out, allowing it to rust.

- Spring Hill, KS, USA

problem #36

May 152011

Sierra 1500 8-cyl

  • 141,084 miles
Brakes failed as I was just leaving the front of my house, tow to garage $65 installed all new brake lines from master cylinder to ABS pump and from ABS pump to each wheels flex line cost of $300.49, hazardous materials$10, labor $500.

- Taylor, MI, USA

problem #35

Dec 032011

Sierra 1500 8-cyl

  • 144,000 miles
I was driving about 35mph and I was coming to a red light so I put on the brakes and I heard a pop and my brake pedal went to the floor and I almost went thru the intersection. I got out of my truck and saw that I was leaking brake fluid from the front. I opened the hood and saw my front brake line was leaking around a corroded area on a hard brake line attached the frame rail. It was a hard brake line failure not a rubber line like in the wheel well. I cant believe that a truck that is 12 years old has a brake line rust thru, this is very dangerous.

- Saint Louis, MO, USA

problem #34

Oct 152011

Sierra 1500

  • 136,000 miles

A D V E R T I S E M E N T S

Was driving to the dump and the brakes failed.. pedal went all the way to the floor. Almost crashed but was able to stop with emergency brake. Brake fluid was poring out from under drivers seat.

- Columbia, CT, USA

problem #33

Oct 042011

Sierra 1500

  • miles
Was driving home and noticed that when the brake was pressed it had to be pressed harder to stop. Once arriving home noticed that brake fluid was leaking from under the driver side rear tire. The brake line is rusted, corroded and has a break in the line. This is absolutely unacceptable.

- Soddy Daisy, TN, USA

problem #32

May 052010

Sierra 1500

  • 148,234 miles
I was parked in front of my home. I was getting ready to leave for work and I pressed the brake pedal down to start the truck and the brake pedal went to the floor. I had the window down so everytime I pressed the brake pedal I heard the pressure of the brake fluid being pushed out the broken brake line. It cost $350 just to get repaired plus a tow. My mechanic said it was caused by the brake line being corroded. It was only one of the four brake lines on my truck but the mechanic said the other ones look pretty bad also and don't have the money to replace all of them.

- West Mifflin, PA, USA

problem #31

Sep 232011

Sierra 1500

  • 94,320 miles

A D V E R T I S E M E N T S

The contact owns a 1999 GMC Sierra 1500. The contact stated that while driving 30 mph, he applied the brakes and the pedal depressed to the floor. The brake light also illuminated on the instrument panel after the failure. The vehicle was safely maneuvered to the shoulder, where the contact noticed that all of the brake lines were corroded and brake fluid was leaking. The vehicle was not repaired. The failure and the current mileages were 94,320.

- Vassar, MI, USA

problem #30

Sep 122011

Sierra 1500 8-cyl

  • 129,994 miles
Returning home turned onto progress dr. Xenia, oh. Had to make a rapid stop (car pulled out in front of me), brakes felt softer, pulled into sioux dr. Xenia, oh. To pick up wife and head a family members house. Drove up sioux dr. Stopped at the stop and turned onto maumee dr., went to push on brake pedal it went to the floor, drove back home and found brake fluid dripping on the driveway. Found that brake line next to frame of truck was leaking. Later found brake fluid on front driveway where I had stop earlier.

- Xenia, OH, USA

problem #29

Jul 182011

Sierra 1500 4WD 8-cyl

  • 70,000 miles
1999 GMC Sierra, two cars infront turning left, went to apply brakes and pedal went to floor, no brakes. Ended up crashing into the car in front of me, which in turn hit the car turning. As I was making sure no one was hurt, I noticed that my truck was leaking brake fluid all over the road.

- Bethel Park, PA, USA

problem #28

Jun 012011

Sierra 1500

  • 130,000 miles
The contact owns a 1999 GMC Sierra 1500. The contact stated when driving at low speeds and decelerating he noticed the anti-lock braking system would engage and it also made a loud grinding noise. The vehicle was not been inspected by a dealer nor had it been repaired. The manufacturer was contacted and advised him that he was not included in NHTSA recall campaign id number 05V379000(service brakes, hydraulic:antilock). The failure mileage was approximately 130,000.

- Sebree, KY, USA

problem #27

May 112011

Sierra 1500 4WD 8-cyl

  • 81,000 miles

A D V E R T I S E M E N T S

While driving highway speed (70 mph) my grandson pressed on the brake to slow down at an exit and lost all but 1/2 in of brake pedal. No accident but barely stopped before an accident occurred. And he is only 17 yrs old and was badly scared.. repair shop changed the rear brake line from the ABS module to the rear brake connection due to being rusted through. Cost was $451. It was also noted that the other 5 brake lines at the ABS module were badly rusted and needed replacement.

- Livonia, MI, USA

problem #26

Mar 252011

Sierra 1500 8-cyl

  • Automatic transmission
  • 48,703 miles
The contact owns a 1999 GMC Sierra C1500. While driving approximately 5 mph, the contact applied pressure to the brakes and the vehicle continued to accelerate. She inspected the vehicle and noticed that the brake lines were covered with rust, corroded and that there was brake fluid leaking. The dealer had not been notified; however, the manufacturer offered no assistance due to the age of the vehicle. No repairs were performed. The failure mileage was 48,703. Updated 05/04/11 updated 09/19/11

- Portage, IN, USA

problem #25

Apr 152010

Sierra 1500

  • 101,166 miles
On April 15 2010, as I was bringing my vehicle to a stop, the brake pedal traveled all the way to the floor. When I got under the vehicle to examine it I saw the rear right brake line was leaking brake fluid badly due to a break in the metal brake line. Again on 2/27/2011, I was stopping my vehicle at a stop sign and the same thing happened at a low speed. Only this time it was a front right brake line. Luckily in my incidents there were no accidents or injuries or deaths, but this is a serious issue with these vehicles, all the rest of my brake lines are in very poor condition at this time and will also need to be changed so I feel safe driving my truck, especially when my family is with me. I have owned twenty plus vehicle in my time and even some of them where General Motors, but I have never seen a vehicle deteriorate the way that this one is.

- Winfield, PA, USA

problem #24

Apr 152010

Sierra 1500

  • 101,166 miles
On April 15 2010, as I was bringing my vehicle to a stop, the brake pedal traveled all the way to the floor. When I got under the vehicle to examine it I saw the rear right brake line was leaking brake fluid badly due to a break in the metal brake line. Again on 2/27/2011, I was stopping my vehicle at a stop sign and the same thing happened at a low speed. Only this time it was a front right brake line. Luckily in my incidents there were no accidents or injuries or deaths, but this is a serious issue with these vehicles, all the rest of my brake lines are in very poor condition at this time and will also need to be changed so I feel safe driving my truck, especially when my family is with me. I have owned twenty plus vehicle in my time and even some of them where General Motors, but I have never seen a vehicle deteriorate the way that this one is.

- Winfield, PA, USA

problem #23

Aug 152009

Sierra 1500 4WD 8-cyl

  • 204,000 miles
Brakes failed due to brake line bursting because of corrosion on 1999 GMC truck.

- West Liberty, OH, USA

problem #22

Dec 172010

Sierra 1500 4WD 8-cyl

  • 130,000 miles
1999 GMC Sierra truck had complete brake failure causing me to hit the car in front of me at a stop light. No indications of brake problems and when attempting to slow for the light, the brake pedal went to the floor.

- Barneveld, WI, USA

problem #21

Nov 302010

Sierra 1500 4WD 8-cyl

  • 73,000 miles
While I driving my 1999 GMC Sierra 1500 pickup, the brake acted very soft when I was coming to a stop on the roadway. I thought at first that I was low on brake fluid. But was able to drive the truck to my mechanic and he checked it out and found the brake lines had corrosion and a small hole opened up throw brake fluid all under the undercarriage in the rear drivers side of the truck. He told me that this isn't the only truck he has seen this problem. I feel that something needs to addressed soon, before people get hurt or killed because of the loss of there brakes. I was just lucky that I was driving down a hill and the normal speed limit. I think this problem has been occurring and needs to be addressed to GMC to do a recall on all there 1999 GMC trucks.

- Claremont, NH, USA

problem #20

Sep 282010

Sierra 1500

  • 197,000 miles
Severe corrosion of the brake lines became apparent during a sudden application of the brakes which caused multiple brake lines to rupture and leave the vehicle with no brakes since a line from the master cylinder to the ABS unit front left input and the ABS to the rear T line blew simultaneously. When removing the damaged brake lines they literally crumbled to pieces due to corrosion. During the repair to the brake lines severe corrosion was noted on the fuel lines also.

- Riverside, OH, USA

problem #19

Nov 082010

Sierra 1500 6-cyl

  • 28,746 miles
My truck was parked. I started my truck. I applied the brake to put my truck in gear. The brake pedal went completely down to the floor. I inspected under my truck, and there was a puddle of brake fluid under the driver's side area on the cement. I saw that all the brake lines connected to the ABS electro-hydraulic control unit are severely rusted, and one of them was leaking severely. I had my truck towed home. There was no warning light on the dash that was blinking to tell me I that I was having a problem with my brakes. They were working fine prior to this failure. I will document the condition of the brake lines with a picture and brake mechanic witnesses before any repairs. I am in the process of locating a brake repair business.

- Clinton, IA, USA

problem #18

Nov 042010

Sierra 1500

  • 80,621 miles
The brake lines under the drivers door on the frame are all rusted and have started to leak from excessive corrosion. Just noticed the leak as the truck was parked outside our house.

- Bensalem, PA, USA

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