Buick Lucerne - Crank, No Start, No Fuel Pressure
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Date: 2020-08-05
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Comments and reviews: 12
Kenneth
The so-called technical bulletin was to cut off part of the seat bracket, and a new low-profile relay. Frankly, bend the bracket 90-degrees is fine. I wrote this problem up and submitted to the NTSB. A few months later GM issued a Recall to replace the fuse box at no cost. The real problem lies in the design of the fuel management system. When a fuel pump begins to enter its end of life, it begins to draw more current, it is this current that causes this problem. Most people that have this melted fuse box, will undoubtedly have a fuel pump sending unit failure soon after. The fuel system in this vehicle runs continuously when the engine is running and as the pump motor begins the fail, it draws an increase in current, not enough to blow the fuse, but, high enough to cause significant heat. Enough heat to melt the connectors inside the fuse block and the relay itself. Frankly, this is simply a poor design change. Older systems the pump cycles on and off to maintain the pressure and using a pressure regulator. Just be aware, it is your fuel pump that causes this fuse box problem to show up.
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The so-called technical bulletin was to cut off part of the seat bracket, and a new low-profile relay. Frankly, bend the bracket 90-degrees is fine. I wrote this problem up and submitted to the NTSB. A few months later GM issued a Recall to replace the fuse box at no cost. The real problem lies in the design of the fuel management system. When a fuel pump begins to enter its end of life, it begins to draw more current, it is this current that causes this problem. Most people that have this melted fuse box, will undoubtedly have a fuel pump sending unit failure soon after. The fuel system in this vehicle runs continuously when the engine is running and as the pump motor begins the fail, it draws an increase in current, not enough to blow the fuse, but, high enough to cause significant heat. Enough heat to melt the connectors inside the fuse block and the relay itself. Frankly, this is simply a poor design change. Older systems the pump cycles on and off to maintain the pressure and using a pressure regulator. Just be aware, it is your fuel pump that causes this fuse box problem to show up.
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North
My second fuse block under the seat just failed. When I first got my Buick Lucerne (2008) I had to replace it. Not again! I spent some time today and rewired a separate external relay and fuse to take care of this problem like others have. Didnt take that long and one of the benefits is that disconnecting my battery reset my TPMS and now it works: ).
I had to get this car running today so I actually soldered direct to the relay and used shrink tubing. I soldered about a foot of wire on each leg of the new relay and heat shrinked the relay leads. Then labeled the wires. I had to do the same with the fuse because I didnt have a fuse link available. I will fix that later. Now its running great now. Took it for a test run and went about 10 miles and new relay is no where near as warm as when it was in the fuse block.
I recommend doing this (as others have) instead of replacing the rear seat fuse block.
Now I have to grind off 5mm of that latch and clean the seats. Should be good to go!
reply
My second fuse block under the seat just failed. When I first got my Buick Lucerne (2008) I had to replace it. Not again! I spent some time today and rewired a separate external relay and fuse to take care of this problem like others have. Didnt take that long and one of the benefits is that disconnecting my battery reset my TPMS and now it works: ).
I had to get this car running today so I actually soldered direct to the relay and used shrink tubing. I soldered about a foot of wire on each leg of the new relay and heat shrinked the relay leads. Then labeled the wires. I had to do the same with the fuse because I didnt have a fuse link available. I will fix that later. Now its running great now. Took it for a test run and went about 10 miles and new relay is no where near as warm as when it was in the fuse block.
I recommend doing this (as others have) instead of replacing the rear seat fuse block.
Now I have to grind off 5mm of that latch and clean the seats. Should be good to go!
reply
Cravin
08 Lucerne died on trip from Iowa to Texas year ago. 2018. Had the car a year. drive about 100 miles a day for work. Never an issue. Got towed into Chevy dealer in Muskogee, OK. Had to replace this fuse box and fuel pump. Also had them replace battery. 2k+! I found video on this problem on YouTube. About 6 months later I get letter from GM saying they'll pay for repairs IF car has been in service less than 10 years and under 120k miles. :-( Really sucks. GM could have replaced that taller relay with the shorter relay anytime. they knew about problem for years. By time we paid for repairs, rented a car, motels and a trip back down to Muskogee the next weekend to pick the car up, this simple thing cost us over 3k! Sucked!
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08 Lucerne died on trip from Iowa to Texas year ago. 2018. Had the car a year. drive about 100 miles a day for work. Never an issue. Got towed into Chevy dealer in Muskogee, OK. Had to replace this fuse box and fuel pump. Also had them replace battery. 2k+! I found video on this problem on YouTube. About 6 months later I get letter from GM saying they'll pay for repairs IF car has been in service less than 10 years and under 120k miles. :-( Really sucks. GM could have replaced that taller relay with the shorter relay anytime. they knew about problem for years. By time we paid for repairs, rented a car, motels and a trip back down to Muskogee the next weekend to pick the car up, this simple thing cost us over 3k! Sucked!
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David
Im impressed that you know what a Farrier is. I was a part-time Farrier for some 30 years. Always held a full time job also for the insurance and bennies. I had many regular customers and also went to the horse shows. I did corrective shoes and made all of my own shoes on a 1900s cavalry forge I picked up at a flee market. Im retired now and very much enjoy watching you videos. I have learned much from you.
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Im impressed that you know what a Farrier is. I was a part-time Farrier for some 30 years. Always held a full time job also for the insurance and bennies. I had many regular customers and also went to the horse shows. I did corrective shoes and made all of my own shoes on a 1900s cavalry forge I picked up at a flee market. Im retired now and very much enjoy watching you videos. I have learned much from you.
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Cal
Thank you Eric for motivated me for this video it was really helpful. I was about to sell the car for that issue of the fuse box. Now i have a question about the fuse box what is the fuse box part number. cause that i know there's two. Can you reply me back thank you i described you hope u make more videos of Buick lucerne 3. 8
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Thank you Eric for motivated me for this video it was really helpful. I was about to sell the car for that issue of the fuse box. Now i have a question about the fuse box what is the fuse box part number. cause that i know there's two. Can you reply me back thank you i described you hope u make more videos of Buick lucerne 3. 8
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Stephen
Thanks so much. I am a technician and rely on help from guys like you. I am a gm tech and familiar with this issue. Been a few years. At an independent now. The owners dont listen nor do they use alldata description and operation, google blogs or youtube etc. Drive me crazy. Lol. Thanks again.
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Thanks so much. I am a technician and rely on help from guys like you. I am a gm tech and familiar with this issue. Been a few years. At an independent now. The owners dont listen nor do they use alldata description and operation, google blogs or youtube etc. Drive me crazy. Lol. Thanks again.
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Venger
Awesome! I just bought a 2008 Lucerne with only 31k miles. Brought it home and shortly after had the same symptoms. Checked the fuse box and found the same.
Glad I saw this video and now know why the relay was burned. Great video. Seems like a fire hazard to me and should be a recall.
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Awesome! I just bought a 2008 Lucerne with only 31k miles. Brought it home and shortly after had the same symptoms. Checked the fuse box and found the same.
Glad I saw this video and now know why the relay was burned. Great video. Seems like a fire hazard to me and should be a recall.
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Michael
This video helped me big time tonight! I was checking relays in my '09 Buick Lucerne and didn't put a relay back in the right place. I noticed this as I was watching the video and where he was pulling the fuel pump relay from in the first 3 minutes. Thank you South Main Auto Repair LLC
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This video helped me big time tonight! I was checking relays in my '09 Buick Lucerne and didn't put a relay back in the right place. I noticed this as I was watching the video and where he was pulling the fuel pump relay from in the first 3 minutes. Thank you South Main Auto Repair LLC
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Slim_Whoa_808
Best info for this situation Ive heard yet. Eric O better then the dealer lol. I got the new fuse box. Now I need 1 of the 3 box screw in harness plugs to the fuse block. Its been a pain trying to find it. What is the correct name for this part or where could I find it at?
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Best info for this situation Ive heard yet. Eric O better then the dealer lol. I got the new fuse box. Now I need 1 of the 3 box screw in harness plugs to the fuse block. Its been a pain trying to find it. What is the correct name for this part or where could I find it at?
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Trevor
Does the Buick Lesabre have the same specific problem as the Lucerne?
Because my Lesabre is not getting any fuel to the engine and i have install a new fuel pump and new fuel lines as well as getting regular tune ups and oil changes.
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Does the Buick Lesabre have the same specific problem as the Lucerne?
Because my Lesabre is not getting any fuel to the engine and i have install a new fuel pump and new fuel lines as well as getting regular tune ups and oil changes.
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