GrouchyOldMan
Open Road
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Joined: 09/30/2017
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Many thanks to RV Owner @RockFishon for troubleshooting a pesty electrical problem. I'm just sharing the details.
"I have a 2015 Chevy Express 4500 RV cutaway for a Coachmen Freelander 21QB with a little over 18,000 miles.
Symptom - When trying to start engine, turn key , dash goes dark and nothing happens, the engine does not turn over. Stop turning key and "SERVICE AIRBAG" is displayed and dash chimes 33 times."
Here's the full thread:
https://www.gmtruckclub.com/threads/2015-chevy-express-4500-service-airbag-and-no-start.1455158/
Bottom line: There's a bad solenoid called the Run/Crank relay, and when it goes out your engine won't crank and you may see the "Service Airbag" message on your console.
Solution is to buy a replacement from Napa or Autozone. The problem solenoid is #15 in the fusebox under the hood on the driver's side. You can try replacing it with the A/C relay #40.
Bonus: Here's a diagram of the fuse box layout.
https://www.autogenius.info/wp-content/uploads/2018/01/chevrolet-express-fuse-box-engine-compartment-2011.jpg
I hope this helps someone as much as it saved me an expensive tow job.
Pay it Forward,
-Grouchy
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Grit dog
Black Diamond, WA
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Joined: 05/06/2013
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Thumbs up!
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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MNtundraRet
Bloomington, MN
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Joined: 12/06/2007
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Very helpful post.
Mark & Jan "Old age & treachery win over youth & enthusiasm"
2003 Fleetwood Jamboree 29
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MrWizard
Traveling
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Joined: 06/27/2004
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Info like this is always welcome i hope members b with the same chassis see this info
I can explain it to you.
But I Can Not understand it for you !
....
Connected using T-Mobile Home internet and Visible Phone service
1997 F53 Bounder 36s
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FunTwoDrv
NC
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Joined: 11/16/2010
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Yep, I've had this relay fail twice in 45K miles!
Gery
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GrouchyOldMan
Open Road
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Joined: 09/30/2017
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Thx guys,
I just returned from Napa with two of these relays. $22 each. Also found them in the AmZone for $13, but three week delivery...
Peace Out,
-Grouchy
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BruceMc
Oregon - Willamette Valley
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Joined: 04/17/2007
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Great information! We have a 2016 Sunseeker on the 2015 Chevy 4500 chassis. It currently has nearly 20K miles and I've never had an issue to date.
If this happens in the future, I'll be armed with this nugget, if I can drag it from the dusty crevices of my noggin!
Having the option to swap the AC relay is very useful; many of the relays are the same, so another option may be at hand from a less needed circuit such as the Big-Brother-is-watching(OnStar) circuit! B^)
'16 Forest River Sunseeker 2250SLEC Chevrolet 6.0L
Previously:
'00 Four Winds 26Q Class C (Ford E350 V10)
'96 Kit Sportsmaster 212f Fifth Wheel/'93 GMC Sierra K2500
'91 SunLite poptop truck camper
and the first: a Wildernest flip-top canopy.
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